Complete the given statements by choosing the appropriate answer from the bracket.
(Transistion elements, 18th group, Alkali metals, rare earths, 1st group)
a) ….............. elements are known as noble gases.
b) The elements showing similarities in chemical properties in groups and periods are known as ................
c) Lanthonoids are also called as .................

Explanation

a) 18th group
b) Transistion elements
c) Rare earths