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Chemie

Atomaufbau und Zusammensetzung

Massenzahl

339

•

25 Jun 2025

•

6 pages

Atoms and Chemistry Fun: Worksheets and Notes for Kids

user profile picture

Olivia Churcher

@oliviachurcher

Discover the amazing world of atoms with our easy worksheets and notes! Learn about atom structures and subatomic particles with cool diagrams. Explore how ionic and covalent bonds work and see differences and similarities. Need help? Check our answer key! Also, find out how temperature and other factors affect chemical reactions. Perfect for Class 9 and 10 students!

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Chemical Bonding

There are four main types of chemical bonding: covalent molecularandnetworkmolecular and network, ionic, and metallic. Each type has distinct properties affecting melting point, boiling point, electrical conductivity, and solubility in water.

Definition: Covalent bonding is the electrostatic force of attraction between two positive nuclei and a shared pair of electrons.

Definition: Ionic bonding is the electrostatic force of attraction between oppositely charged ions.

Definition: Metallic bonding is the electrostatic force of attraction between positively charged ions and delocalized electrons.

The properties of substances are directly related to their bonding type. For example, covalent molecular compounds typically have low melting and boiling points, while ionic compounds have high melting and boiling points.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Molecular Shapes

Molecules can adopt various shapes based on the arrangement of atoms and electron pairs. Common shapes include linear, tetrahedral, pyramidal, and angular.

Example: Water H2OH₂O has an angular shape, while methane CH4CH₄ is tetrahedral.

Understanding molecular shapes is crucial for predicting a molecule's polarity and reactivity, which are important concepts in National 5 Chemistry Unit 2.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Chemical Formulas

Chemical formulas represent the composition of compounds using element symbols and numerical subscripts. Prefixes like mono-, di-, and tri- indicate the number of atoms in a molecule.

Vocabulary: Valency is the combining power of an atom, determined by the number of electrons it can share or transfer.

To write a chemical formula:

  1. Write down the symbols of the elements.
  2. Note their valencies.
  3. Swap the valencies.
  4. Simplify if possible by dividing through.

This method is essential for N5 Chemistry bonding questions and understanding chemical reactions.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Rates of Reaction

Chemical reactions can be identified by various signs, including the formation of a precipitate, gas production, color change, or energy change.

Definition: An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Factors affecting reaction rates include:

  • Particle size
  • Concentration
  • Temperature
  • Presence of a catalyst

Highlight: The collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula:

Average rate = Change in Quantity / Change in Time

This concept is crucial for solving National 5 Chemistry Rates of reaction Questions and understanding the relationship between concentration and rate of reaction.

Example: To calculate the average rate of a reaction where 50g of product is formed in 10 minutes, use the formula: Average rate = 50g / 10 minutes = 5g/minute.

Understanding these concepts is essential for success in Nat 5 Chemistry Past Papers and mastering the N5 Chemistry course specification.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Page 6: Rates of Reaction

This page covers the factors affecting the rate of chemical reactions pdf, a crucial topic in chemistry. Signs of a chemical reaction include:

  • Formation of a precipitate
  • Gas production
  • Color change
  • Energy change

Definition: Exothermic reactions release heat, while endothermic reactions absorb heat.

The 5 factors that affect the rate of reaction are:

  1. Particle size
  2. Concentration
  3. Temperature
  4. Catalysts
  5. Surface area impliedimplied

Highlight: Collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula: Average rate = Change in Quantity / Change in Time

Understanding these concepts is crucial for factors affecting rate of reaction Class 12 and advanced chemistry studies.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Atomic Structure

The atom consists of three subatomic particles: protons, neutrons, and electrons. The nucleus contains protons and neutrons, while electrons orbit around it.

Vocabulary: Nuclide notation is a way of representing atoms using their mass number and atomic number.

Example: The nuclide notation for iron-56 is ²⁶⁵⁶Fe.

Isotopes are atoms of the same element with different numbers of neutrons. The relative atomic mass is the average mass of an atom of an element, taking into account the abundance of its isotopes.

Highlight: An atom is electrically neutral because it has an equal number of protons and electrons.



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Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

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Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

Chemie

Atomaufbau und Zusammensetzung

Massenzahl

 

Chemistry

•

339

•

25 Jun 2025

•

6 pages

Atoms and Chemistry Fun: Worksheets and Notes for Kids

user profile picture

Olivia Churcher

@oliviachurcher

Discover the amazing world of atoms with our easy worksheets and notes! Learn about atom structures and subatomic particles with cool diagrams. Explore how ionic and covalent bonds work and see differences and similarities. Need help? Check our answer key! Also, find out how temperature and other factors affect chemical reactions. Perfect for Class 9 and 10 students!

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Chemical Bonding

There are four main types of chemical bonding: covalent molecularandnetworkmolecular and network, ionic, and metallic. Each type has distinct properties affecting melting point, boiling point, electrical conductivity, and solubility in water.

Definition: Covalent bonding is the electrostatic force of attraction between two positive nuclei and a shared pair of electrons.

Definition: Ionic bonding is the electrostatic force of attraction between oppositely charged ions.

Definition: Metallic bonding is the electrostatic force of attraction between positively charged ions and delocalized electrons.

The properties of substances are directly related to their bonding type. For example, covalent molecular compounds typically have low melting and boiling points, while ionic compounds have high melting and boiling points.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Molecular Shapes

Molecules can adopt various shapes based on the arrangement of atoms and electron pairs. Common shapes include linear, tetrahedral, pyramidal, and angular.

Example: Water H2OH₂O has an angular shape, while methane CH4CH₄ is tetrahedral.

Understanding molecular shapes is crucial for predicting a molecule's polarity and reactivity, which are important concepts in National 5 Chemistry Unit 2.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Chemical Formulas

Chemical formulas represent the composition of compounds using element symbols and numerical subscripts. Prefixes like mono-, di-, and tri- indicate the number of atoms in a molecule.

Vocabulary: Valency is the combining power of an atom, determined by the number of electrons it can share or transfer.

To write a chemical formula:

  1. Write down the symbols of the elements.
  2. Note their valencies.
  3. Swap the valencies.
  4. Simplify if possible by dividing through.

This method is essential for N5 Chemistry bonding questions and understanding chemical reactions.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Rates of Reaction

Chemical reactions can be identified by various signs, including the formation of a precipitate, gas production, color change, or energy change.

Definition: An exothermic reaction releases heat, while an endothermic reaction absorbs heat.

Factors affecting reaction rates include:

  • Particle size
  • Concentration
  • Temperature
  • Presence of a catalyst

Highlight: The collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula:

Average rate = Change in Quantity / Change in Time

This concept is crucial for solving National 5 Chemistry Rates of reaction Questions and understanding the relationship between concentration and rate of reaction.

Example: To calculate the average rate of a reaction where 50g of product is formed in 10 minutes, use the formula: Average rate = 50g / 10 minutes = 5g/minute.

Understanding these concepts is essential for success in Nat 5 Chemistry Past Papers and mastering the N5 Chemistry course specification.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Page 6: Rates of Reaction

This page covers the factors affecting the rate of chemical reactions pdf, a crucial topic in chemistry. Signs of a chemical reaction include:

  • Formation of a precipitate
  • Gas production
  • Color change
  • Energy change

Definition: Exothermic reactions release heat, while endothermic reactions absorb heat.

The 5 factors that affect the rate of reaction are:

  1. Particle size
  2. Concentration
  3. Temperature
  4. Catalysts
  5. Surface area impliedimplied

Highlight: Collision theory states that for a reaction to occur, particles must collide with sufficient energy and correct orientation.

The average rate of reaction is calculated using the formula: Average rate = Change in Quantity / Change in Time

Understanding these concepts is crucial for factors affecting rate of reaction Class 12 and advanced chemistry studies.

UNII 4 The structure of an atom" atoms are made up of three subatomic particles + proton + ㅏ mass and charge of particles Particle proton ne

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Atomic Structure

The atom consists of three subatomic particles: protons, neutrons, and electrons. The nucleus contains protons and neutrons, while electrons orbit around it.

Vocabulary: Nuclide notation is a way of representing atoms using their mass number and atomic number.

Example: The nuclide notation for iron-56 is ²⁶⁵⁶Fe.

Isotopes are atoms of the same element with different numbers of neutrons. The relative atomic mass is the average mass of an atom of an element, taking into account the abundance of its isotopes.

Highlight: An atom is electrically neutral because it has an equal number of protons and electrons.

We thought you’d never ask...

What is the Knowunity AI companion?

Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.

Where can I download the Knowunity app?

You can download the app from Google Play Store and Apple App Store.

Is Knowunity really free of charge?

That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

Best app on earth! no words because it’s too good

Thomas R

iOS user

Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.

Basil

Android user

This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.

Rohan U

Android user

I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.

Xander S

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now

Paul T

iOS user