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Updated Mar 17, 2026
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Understanding Bonding in NAT 5 Chemistry
E
emily
@emily_wncfw
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Covalent Bonding and Molecules
Ever wondered how water stays together or why oxygen gas exists as O₂? Covalent bonding happens when non-metal atoms share electrons to stick together. The shared electrons create an electrostatic attraction between the positive nuclei and the electron pair - think of it as atoms holding hands through their electrons.
Covalent molecules are small structures with strong bonds inside but weak attractions between different molecules. This explains why water boils at just 100°C - those weak intermolecular forces break easily. These molecules can't conduct electricity because there are no free-moving charged particles floating about.
The shape matters too! Molecules come in four main shapes: linear (like carbon dioxide), angular (like water), trigonal pyramidal (like ammonia), and tetrahedral (like methane). These shapes affect how molecules interact with each other.
Quick tip: Remember that covalent substances dissolve in other covalent solvents - "like dissolves like" is a handy rule!
Covalent Networks and Ionic Bonding
Not all covalent substances are small molecules. Covalent networks like diamond and graphite are massive structures where strong covalent bonds extend throughout the entire material. This makes them incredibly tough with sky-high melting points - you'd need thousands of degrees to melt diamond!
Ionic bonding works completely differently. When metals meet non-metals, electrons transfer from one to the other, creating oppositely charged ions that attract each other. Picture sodium giving an electron to chlorine to make salt - the resulting ionic lattice is held together by powerful electrostatic forces.
Ionic compounds have high melting points because those electrostatic attractions are seriously strong. They're brilliant conductors when molten or dissolved because the ions can move freely, but they're hopeless as solids since the ions are locked in place.
Remember: Ionic compounds dissolve in water because water molecules can surround and separate the ions!
Metallic Bonding
Metals have their own special bonding trick that explains why they're so useful. Metallic bonding occurs when positive metal ions sit in a "sea" of delocalised electrons that can move freely throughout the structure. Think of it as electrons that don't belong to any particular atom but wander around helping everyone.
This electron mobility is why metals conduct electricity so well - those free electrons can carry current through the material. The strong attraction between positive ions and the electron sea also gives metals their high melting and boiling points.
Unlike ionic compounds, metals don't dissolve in water. The metallic bonding is too strong and doesn't interact well with water molecules, which is why your copper pipes don't dissolve when water flows through them!
Key insight: The "electron sea" model explains almost all metallic properties - conductivity, strength, and insolubility all come from those mobile electrons!
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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
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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
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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
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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
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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 Knowunity AI. 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
Understanding Bonding in NAT 5 Chemistry
E
emily
@emily_wncfw
Understanding chemical bonding is crucial for grasping how atoms stick together to form everything around you. There are three main types of bonding - covalent, ionic, and metallic - each with unique properties that determine how substances behave in the... Show more
Covalent Bonding and Molecules
Ever wondered how water stays together or why oxygen gas exists as O₂? Covalent bonding happens when non-metal atoms share electrons to stick together. The shared electrons create an electrostatic attraction between the positive nuclei and the electron pair - think of it as atoms holding hands through their electrons.
Covalent molecules are small structures with strong bonds inside but weak attractions between different molecules. This explains why water boils at just 100°C - those weak intermolecular forces break easily. These molecules can't conduct electricity because there are no free-moving charged particles floating about.
The shape matters too! Molecules come in four main shapes: linear (like carbon dioxide), angular (like water), trigonal pyramidal (like ammonia), and tetrahedral (like methane). These shapes affect how molecules interact with each other.
Quick tip: Remember that covalent substances dissolve in other covalent solvents - "like dissolves like" is a handy rule!
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Covalent Networks and Ionic Bonding
Not all covalent substances are small molecules. Covalent networks like diamond and graphite are massive structures where strong covalent bonds extend throughout the entire material. This makes them incredibly tough with sky-high melting points - you'd need thousands of degrees to melt diamond!
Ionic bonding works completely differently. When metals meet non-metals, electrons transfer from one to the other, creating oppositely charged ions that attract each other. Picture sodium giving an electron to chlorine to make salt - the resulting ionic lattice is held together by powerful electrostatic forces.
Ionic compounds have high melting points because those electrostatic attractions are seriously strong. They're brilliant conductors when molten or dissolved because the ions can move freely, but they're hopeless as solids since the ions are locked in place.
Remember: Ionic compounds dissolve in water because water molecules can surround and separate the ions!
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Metallic Bonding
Metals have their own special bonding trick that explains why they're so useful. Metallic bonding occurs when positive metal ions sit in a "sea" of delocalised electrons that can move freely throughout the structure. Think of it as electrons that don't belong to any particular atom but wander around helping everyone.
This electron mobility is why metals conduct electricity so well - those free electrons can carry current through the material. The strong attraction between positive ions and the electron sea also gives metals their high melting and boiling points.
Unlike ionic compounds, metals don't dissolve in water. The metallic bonding is too strong and doesn't interact well with water molecules, which is why your copper pipes don't dissolve when water flows through them!
Key insight: The "electron sea" model explains almost all metallic properties - conductivity, strength, and insolubility all come from those mobile electrons!
We thought you’d never ask...
What is the Knowunity AI companion?
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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 Knowunity AI. 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 Knowunity AI. 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