chemistry 4.6

Elements in Period 3 are arranged according to the number of_____

• shells

• valence electrons

Physical state of Period 3 elements changes from_____

• solid to gas

• gas to solid

Chlorine and argon exist as_____

• solids

• gases

Sodium, magnesium, aluminium, silicon, phosphorus and sulphur exist as______

• solids

• gases

Sodium, magnesium and aluminium are _____ elements.

• metal

• non-metal

Silicon is a _____ elements.

• metal

• metalloid

Phosphorus, sulphur, chlorine and argon are _____ elements.

• metal

• non-metal

Increase in the number of _____ across Period 3 increases the charge in the nucleus of atom.

• protons

• electrons