7.4

Question 1

Metals

Answer 1

elements that conduct heat and electricity; shiny solids that can be made into thin wires and sheets that bend easily. Mercury is the only liquid metal.

Question 2

Non-metals

Answer 2

elements that do not conduct electricity or heat. They melt and turn into gases easily and are brittle and often coloured.

Question 3

Metalloids

Answer 3

elements that have the appearance of metals but not all the other properties of metals