These species feature elements from groups 1, 2 and 13-18 (excluding hydrogen) of the periodic table.

The halogens are found in group 17 of the periodic table of the Chemical element.

What they hadn't told him was that caesium is an alkali metal found in group one of the periodic table.

It is in the precious metal, or platinum, group (group 8) of the periodic table.

So to the eight groups of the table, Mendeleev now added a final Group 0.

It is a main group metal in group 14 of the periodic table.

It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table.

It is in group 18 (noble gases) of the periodic table.

In chemistry, Roman numerals are often used to denote the groups of the periodic table.

It is the first element of group 12 of the periodic table.