Covelant bonds/Giant molecular compounds

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A Covalent bond are 2 non metals (Same or different) that share electrons

A covalent compound has a low melting/boiling point and will NOT conduct electricity, this is because there are no ions or de-localised (free) electrons

These are some examples of covalent bonds shown in a cross and dot model (The cross and dots represent different elements)

Something becomes a covalent bond when it SHARES a bond that is linked by and electron

These are examples of a giant molecular compound

DIAMOND

GRAPHITE

SILICA

Most of these giant molecular compounds are arranged into a giant regular lattice structure

Giant molecular compounds

Giant molecular compounds are:

- Very conductive

- Have very high melting points

GRAPHITE: Weak bonds, break easily, carbon atoms form layers that slim over each other easily, conducts well

DIAMOND: Very strong carbon bonds, extermly hard to break (virtually impossible) does not conduct

SILICA: Similar to diamond, it has a very high melting point, and is very hard to break, contains silicon and oxygen atoms instead of carbon

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