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GCSE Chemistry: Basic Definitions, Filtration & Crystallisation

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Paige Jane

20/10/2022

Chemistry

Chemistry gcse revision -atoms,elements and compounds

827

20 Oct 2022

2 pages

GCSE Chemistry: Basic Definitions, Filtration & Crystallisation

user profile picture

Paige Jane

@paigejflash

Atoms, elements, compounds, and mixtures form the foundation of basic... Show more

All substances are made of atoms, an atom
is the smallest part of an element
An element is a substance that contains only
One sort of a fom

Mixtures and Separation Techniques

Mixtures are distinct from compounds in that they consist of two or more elements or compounds that are not chemically combined. This characteristic allows for various separation techniques in Chemistry to be applied.

Definition: A mixture is a combination of two or more substances where each component retains its own chemical properties.

The components in a mixture can be separated using physical processes, which is a key topic in GCSE Chemistry separation techniques exam questions. Some of these techniques include:

  1. Filtration: This method is used to separate insoluble solids from liquids or solutions. It's a fundamental technique in the crystallisation method GCSE AQA.

Example: Dissolving salt in water and then filtering it to remove any insoluble impurities.

  1. Crystallisation: This process is employed to obtain a soluble solid from a solution through evaporation. It's a crucial part of understanding crystallisation gcse Chemistry.

Highlight: The crystallization method step-by-step typically involves dissolving a substance, filtering out impurities, and then allowing the solution to evaporate slowly to form crystals.

  1. Fractional distillation: This technique separates mixtures with different boiling points, which is often covered in Separation techniques bbc Bitesize KS3.
  2. Chromatography: This method separates mixtures based on the different rates at which components move through a medium.

Vocabulary: Chromatography is derived from Greek words meaning "color writing," reflecting its original use in separating plant pigments.

Understanding these separation techniques in Chemistry PDF resources and practicing with GCSE Chemistry separation techniques exam questions will help students master this important topic in their studies.

All substances are made of atoms, an atom
is the smallest part of an element
An element is a substance that contains only
One sort of a fom

Atoms, Elements, and Compounds

Atoms are the fundamental building blocks of matter in chemistry. They form the basis for understanding elements and compounds, which are crucial concepts in GCSE Chemistry separation techniques.

Definition: An atom is the smallest part of an element that retains the properties of that element.

Elements are pure substances composed of only one type of atom. They are the simplest form of matter and can be found on the periodic table.

Example: Sodium NaNa is an element represented by its chemical symbol on the periodic table.

Compounds are more complex substances that contain atoms of two or more elements chemically combined in fixed proportions. They are represented by chemical formulas.

Vocabulary: A chemical formula is a way of expressing the composition of a compound using symbols and numbers.

Example: H₂O is the chemical formula for water, indicating that it contains two hydrogen atoms and one oxygen atom.

Highlight: Understanding the differences between atoms, elements, and compounds is crucial for mastering GCSE Chemistry mixtures separation techniques.



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Where can I download the Knowunity app?

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Stefan S

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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

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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

 

Chemistry

827

20 Oct 2022

2 pages

GCSE Chemistry: Basic Definitions, Filtration & Crystallisation

user profile picture

Paige Jane

@paigejflash

Atoms, elements, compounds, and mixtures form the foundation of basic definitions gcse chemistry. This summary explores these concepts and various separation techniques in Chemistry, including filtration and crystallisation.

  • Atoms are the smallest units of elements
  • Elements are... Show more

All substances are made of atoms, an atom
is the smallest part of an element
An element is a substance that contains only
One sort of a fom

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

Mixtures and Separation Techniques

Mixtures are distinct from compounds in that they consist of two or more elements or compounds that are not chemically combined. This characteristic allows for various separation techniques in Chemistry to be applied.

Definition: A mixture is a combination of two or more substances where each component retains its own chemical properties.

The components in a mixture can be separated using physical processes, which is a key topic in GCSE Chemistry separation techniques exam questions. Some of these techniques include:

  1. Filtration: This method is used to separate insoluble solids from liquids or solutions. It's a fundamental technique in the crystallisation method GCSE AQA.

Example: Dissolving salt in water and then filtering it to remove any insoluble impurities.

  1. Crystallisation: This process is employed to obtain a soluble solid from a solution through evaporation. It's a crucial part of understanding crystallisation gcse Chemistry.

Highlight: The crystallization method step-by-step typically involves dissolving a substance, filtering out impurities, and then allowing the solution to evaporate slowly to form crystals.

  1. Fractional distillation: This technique separates mixtures with different boiling points, which is often covered in Separation techniques bbc Bitesize KS3.
  2. Chromatography: This method separates mixtures based on the different rates at which components move through a medium.

Vocabulary: Chromatography is derived from Greek words meaning "color writing," reflecting its original use in separating plant pigments.

Understanding these separation techniques in Chemistry PDF resources and practicing with GCSE Chemistry separation techniques exam questions will help students master this important topic in their studies.

All substances are made of atoms, an atom
is the smallest part of an element
An element is a substance that contains only
One sort of a fom

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

Atoms, Elements, and Compounds

Atoms are the fundamental building blocks of matter in chemistry. They form the basis for understanding elements and compounds, which are crucial concepts in GCSE Chemistry separation techniques.

Definition: An atom is the smallest part of an element that retains the properties of that element.

Elements are pure substances composed of only one type of atom. They are the simplest form of matter and can be found on the periodic table.

Example: Sodium NaNa is an element represented by its chemical symbol on the periodic table.

Compounds are more complex substances that contain atoms of two or more elements chemically combined in fixed proportions. They are represented by chemical formulas.

Vocabulary: A chemical formula is a way of expressing the composition of a compound using symbols and numbers.

Example: H₂O is the chemical formula for water, indicating that it contains two hydrogen atoms and one oxygen atom.

Highlight: Understanding the differences between atoms, elements, and compounds is crucial for mastering GCSE Chemistry mixtures separation techniques.

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