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Created by AishaPatel
over 9 years ago
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Question | Answer |
How are compounds formed? | When two or more elements are chemically combined together |
What's different about isotopes? | They have extra neutrons |
Which type of bonding lose or gain electrons to form ions? | Ionic Bonding |
What are charged particles known as? | Ions |
Describe the periodic groups/shell which is willing to gain electrons? | A nearly full shell mostly groups 6 and 7 |
What do ionic compounds always have? | A giant ionic lattice |
Why do ions form a closely packed regular lattice arrangement? | There are very strong electrostatic forces of attraction between oppositely charged ions in all directions |
Do ionic compounds have a high melting/boiling point or a low melting/boiling point? why? | High melting and boiling point due to the strong attraction between ions |
When ionic compounds melt and ions are free to move what can they do? | Carry electric current |
What is the overall charge of any compound? | Zero |
What is a covalent bond? | Where atoms share electrons with each other so they've got a full outer shell to form strong covalent bonds |
What does each covalent bond provide? | One extra shared electron for each atom |
What is different about the covalent bond between two oxygen atoms? | They have a double covalent bond |
Simple molecular substances don't conduct electricity, what does this mean? | There are no ions, so there's no electrical charge |
Simple molecular forces of attraction between molecules are weak. What does this mean? | Due to the inter-molecular forces, melting and boiling points are very low |
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