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23 May 2023
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revision
@revision17
OCR GCSE Chemistry Revision: Atomic Structure, Bonding, and Reactions
This... Show more
The second page of this OCR GCSE Chemistry revision guide focuses on chemical bonding and introduces the concept of nanoparticles. It provides a detailed comparison between metals and non-metals, explaining their properties and positions in the periodic table.
Example: Group 1 metals form +1 ions, while Group 7 non-metals form -1 ions.
The guide explains ionic and covalent bonding, two fundamental types of chemical bonds covered in GCSE Chemistry. It introduces dot-cross diagrams as a way to represent the electronic structure of atoms and the formation of bonds.
Definition: Ionic bonding occurs between metals and non-metals, while covalent bonding typically occurs between non-metals.
The page also covers important concepts such as empirical formula and formula mass, which are crucial for chemical calculations in OCR Chemistry GCSE.
Highlight: Nanoparticles are particles between 1 and 100 nanometres in size. They have various applications in modern technology and medicine.
The guide discusses the uses of nanoparticles in areas such as healthcare, cosmetics, and electronics. It also mentions potential risks associated with nanoparticles, such as their ability to enter the bloodstream and potentially cause harm.
This section provides essential knowledge for students studying Chemistry OCR Gateway GCSE and prepares them for questions on bonding and modern materials in their exams.
The third page of this OCR GCSE Chemistry revision guide focuses on chemical reactions, with a particular emphasis on electrolysis and acid-base reactions. This section is crucial for students preparing for OCR GCSE Chemistry Questions by topic.
Definition: Electrolysis is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.
The guide explains the process of electroplating, a practical application of electrolysis used in industry. It also covers the concept of reduction, which is central to understanding electrolysis reactions.
Example: In the reduction of copper ions, Cu²⁺ + 2e⁻ → Cu, the copper ions gain electrons to form copper metal.
The page introduces the pH scale and discusses acid-base reactions, including neutralization. These concepts are fundamental in GCSE Chemistry and often appear in exam questions.
Vocabulary: Neutralization is a chemical reaction in which an acid and a base react quantitatively with each other to form a salt and water.
The guide also covers reaction profiles, which help students visualize the energy changes that occur during chemical reactions. It introduces the concept of activation energy, which is crucial for understanding reaction rates.
Highlight: The law of conservation of mass states that atoms are neither created nor destroyed in chemical reactions. This is why balanced symbol equations have the same number of atoms of each element on both sides.
This section provides essential knowledge for students studying OCR Chemistry GCSE and prepares them for questions on chemical reactions and electrolysis in their exams. It also reinforces the importance of balancing equations and understanding energy changes in reactions.
The first page of this OCR GCSE Chemistry revision guide focuses on the fundamental concepts of atomic structure and particle theory. It provides a comprehensive overview of the basic building blocks of matter and their properties.
Definition: An atom is the smallest part of an element that can exist, with a radius of around 0.1 nanometres and no overall charge.
The guide explains the differences between atoms, elements, and compounds, which are crucial concepts in GCSE Chemistry. It also covers the states of matter and their characteristics in terms of particle arrangement and movement.
Highlight: The atomic model has evolved over time, with contributions from various scientists including John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, and Erwin Schrödinger.
The page delves into the structure of the atom, explaining the concepts of atomic number and mass number. It introduces the subatomic particles - protons, neutrons, and electrons - and their locations within the atom.
Vocabulary: The nucleus is the central part of an atom, containing protons and neutrons, while electrons orbit around it.
This section of the OCR Chemistry GCSE topics provides a solid foundation for understanding more complex chemical concepts and is essential for students preparing for their GCSE Chemistry revision.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
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
revision
@revision17
OCR GCSE Chemistry Revision: Atomic Structure, Bonding, and Reactions
This comprehensive guide covers key topics in OCR Chemistry GCSE, including atomic structure, bonding, and chemical reactions. It provides essential information for students preparing for their GCSE Chemistry revision.... Show more
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The second page of this OCR GCSE Chemistry revision guide focuses on chemical bonding and introduces the concept of nanoparticles. It provides a detailed comparison between metals and non-metals, explaining their properties and positions in the periodic table.
Example: Group 1 metals form +1 ions, while Group 7 non-metals form -1 ions.
The guide explains ionic and covalent bonding, two fundamental types of chemical bonds covered in GCSE Chemistry. It introduces dot-cross diagrams as a way to represent the electronic structure of atoms and the formation of bonds.
Definition: Ionic bonding occurs between metals and non-metals, while covalent bonding typically occurs between non-metals.
The page also covers important concepts such as empirical formula and formula mass, which are crucial for chemical calculations in OCR Chemistry GCSE.
Highlight: Nanoparticles are particles between 1 and 100 nanometres in size. They have various applications in modern technology and medicine.
The guide discusses the uses of nanoparticles in areas such as healthcare, cosmetics, and electronics. It also mentions potential risks associated with nanoparticles, such as their ability to enter the bloodstream and potentially cause harm.
This section provides essential knowledge for students studying Chemistry OCR Gateway GCSE and prepares them for questions on bonding and modern materials in their exams.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The third page of this OCR GCSE Chemistry revision guide focuses on chemical reactions, with a particular emphasis on electrolysis and acid-base reactions. This section is crucial for students preparing for OCR GCSE Chemistry Questions by topic.
Definition: Electrolysis is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.
The guide explains the process of electroplating, a practical application of electrolysis used in industry. It also covers the concept of reduction, which is central to understanding electrolysis reactions.
Example: In the reduction of copper ions, Cu²⁺ + 2e⁻ → Cu, the copper ions gain electrons to form copper metal.
The page introduces the pH scale and discusses acid-base reactions, including neutralization. These concepts are fundamental in GCSE Chemistry and often appear in exam questions.
Vocabulary: Neutralization is a chemical reaction in which an acid and a base react quantitatively with each other to form a salt and water.
The guide also covers reaction profiles, which help students visualize the energy changes that occur during chemical reactions. It introduces the concept of activation energy, which is crucial for understanding reaction rates.
Highlight: The law of conservation of mass states that atoms are neither created nor destroyed in chemical reactions. This is why balanced symbol equations have the same number of atoms of each element on both sides.
This section provides essential knowledge for students studying OCR Chemistry GCSE and prepares them for questions on chemical reactions and electrolysis in their exams. It also reinforces the importance of balancing equations and understanding energy changes in reactions.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The first page of this OCR GCSE Chemistry revision guide focuses on the fundamental concepts of atomic structure and particle theory. It provides a comprehensive overview of the basic building blocks of matter and their properties.
Definition: An atom is the smallest part of an element that can exist, with a radius of around 0.1 nanometres and no overall charge.
The guide explains the differences between atoms, elements, and compounds, which are crucial concepts in GCSE Chemistry. It also covers the states of matter and their characteristics in terms of particle arrangement and movement.
Highlight: The atomic model has evolved over time, with contributions from various scientists including John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, and Erwin Schrödinger.
The page delves into the structure of the atom, explaining the concepts of atomic number and mass number. It introduces the subatomic particles - protons, neutrons, and electrons - and their locations within the atom.
Vocabulary: The nucleus is the central part of an atom, containing protons and neutrons, while electrons orbit around it.
This section of the OCR Chemistry GCSE topics provides a solid foundation for understanding more complex chemical concepts and is essential for students preparing for their GCSE Chemistry revision.
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
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
