Chemistry- C2 Part A

1. This happens between two non-metal atoms, the shared electrons make up a full outer shell so the atom is stable (8, 7)
5. ... are made when electrons are transferred (4)
9. This element only has one layer, very strong and light, can conduct electricity and contains delocalised electrons (8)
10. They have high melting and boiling points, when solid they can't conduct electricity, but when liquid they can conduct and they dissolve easily in water (5, 9)

2. This type of bonding involves delocalised electrons, two metal atoms together, bonding is very strong and there are strong forces of electrostatic attraction between positive ions and negative electrons (8, 7)
3. This element has 4 covalent bonds so it is very hard, it has a very high melting point, it doesn't conduct electricity as it has no free electrons (7)
4. In this structure atoms are bonded to each other by strong covalent bonds, they have very high melting and boiling points, they don't conduct electricity (apart from Graphite) (5, 8)
6. These are structures are called ... with very strong electrostatic forces of attraction between oppositely charged ions closely arranged (5, 5, 7)
7. These substance are held together by strong covalent bonds, molecules are weak, the melting and boiling points are low, they don't conduct electricity, and as the molecule gets bigger, forces increase, melting and boiling points increase (6, 9)
8. This is between a metal and a non-metal, Opposite charged ions are attracted by electrostatic forces (5, 7)

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