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Flashcards by Anisah Arif, updated more than 1 year ago
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| Question | Answer |
| What is a compound? | A substance in which two atoms of two or more elements are chemically combined. |
| What does chemical bonding involve? | Either transferring or sharing electrons in the highest occupied energy levels (shells). |
| What does chemical bonding achieve? | The electronic structure of a noble gas |
| When atoms form chemical bonds, what do they form? | IONS |
| What happens when an atom loses an electron? | It becomes positively charged. |
| What happens when an atom gains an electron? | It becomes negatively charged |
| What do metal atoms form? | Positive ions. |
| What do non-metal atoms form? | Negative ions. |
| What is an ionic bond? | The electrostatic force of attraction between positively and negatively charged ions |
| How would you work out how many charges an ion should have? | - When it's a metal ion the charge is equal to the group number of the metal. - When it's a non-metal the charge is equal to the group number minus 8. |
| What is an ionic compound? | When metals and non-metals share electrons forming ions. A giant structure of ions. |
| When atoms share pairs of electrons, what do they form? | Covalent bonds. |
| What do metals consist of in structure and bonding? | Giant structures of atoms arranged in a regular pattern. |
| What are delocalised electrons? | A bonding electron that is no longer associated with any one particular atom |
| What is a fullerene? | A form of the element carbon that can exist as a cage like structure of hexagonal rings of the carbon atoms |
| What are the properties of a giant covalent structure? | - high melting and boiling points - insoluble in water - hard and do not conduct electricity |
| What is a catalyst? | A substance that changes the rate of a reaction but remains unchanged by the end of it |
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