Bonding AJR

In which compounds are pairs of electrons shared between atoms?

1 methane

2 lead bromide

3 sodium chloride

• 1 only

• 2 only

• 1 and 3

• 1, 2 and 3

metals can conduct because they have ____________ ____________ which can move and carry charge.

Molten ionic substances can conduct electricity because ____ are free to move

Word that means "can be hammered into shape"

Word that means "can be drawn into a wire"

A mixture of metals and at least one other element

Diamond and graphite have giant covalent structures of carbon atoms.

Which statement describes graphite?

• It has a strong, rigid three-dimensional structure.

• It has four strong covalent bonds between each carbon atom.

• It has layers, which can slide over each other.

• It has no free electrons, so does not conduct electricity.

Covalent bonds are usually formed between...

• A metal and a non-metal

• Two non-metals

• Two metals

How many covalent bonds does carbon form in this molecule?

• 1

• 4

• 5

• 8

A charged particle that has gained or lost electrons is called a _____.

• molecule
• ion
• isotope
• element