The most reactive nonmetal.

Atomic number of 12.

An alkali metal in period 4.

The most abundant element in the air. Hint: it has an atomic number of 7.

A metal with 3 valence electrons, used in cans.

A period 3 element that will not react naturally.

5 valence electrons and is in period 3.

Use each clue below to determine the identity of the element on the periodic table. Clue 9: The most reactive metal.

A period 1 element used to make balloons float.

The only nonmetal in group 1.

Responsible for the smell of rotten eggs. Hint: it has 16 protons.

Has an atomic number that is twice that of silicon.

The most reactive metal.

A group 12 metal that is a liquid at room temperature, but is now known to be poisonous.

Has 3 valence electrons and 4 energy levels.

The only metalloid in period 3.

The only metalloid with 2 energy levels.

The alkali metal that makes up table salt.

A nonmetal with zero neutrons.