Bonding, paper 1&2 Flashcards Preview

Chemistry > Bonding, paper 1&2 > Flashcards

Flashcards in Bonding, paper 1&2 Deck (11)
Loading flashcards...
1

An ion

An atom which has lost or gained an electron therefore has a charge.

2

Ionic bonding

Where a metal and non-metal join together they pass over electrons to others atoms outer shells until they have a full outer shell.

3

Ionic bonds

- strong due to charges. + and - attract.

4

Covalent bonding

Between two non-metals
Where outer shells overlap they share electrons so all atoms have full outer shells.

5

Properties of ionic substances

- dissolve in water
- metal in them
- high melting point
- will conduct in liquid form.

6

Properties of covalent substances

- low melting point
- don’t dissolve
- don’t conduct

7

Graphite

- can conduct - delocalised electron
- made fully of carbon
- giant covalent - hexagonal structure.
- weak forces between layers - good for pencils
- high melting/boiling
- insolvable
- one carbon bonds to 3 others.

8

Diamond

- high melting/boiling
- very stable
- one carbon is joined to 4 others
- doesn’t conduct
- giant covalent structure

9

Properties of ALL metals:

- hard
- conduct
- don’t dissolve
- malleable
- high melting or boiling bar mercury
- sonorous

10

Metallic bonding

Between two metals
Weak forces between layers
Works by delocalised electrons

11

How metallic bonding works:

The electrons in metal all delocalise and form a ‘sea’ this acts as a ‘glue’ as the charges the - of the electrons and + of the atoms.