State the term for the following:

(a) The number of atoms present in a molecule of an element.

(b) The symbolic representation of a molecule.

(c) A group of atoms that react as a single unit.

(d) The combining capacity of an element.

(e) The tabular arrangement of elements in horizontal rows and vertical columns.

(a) Atomicity

(b) Molecular formula

(c) Radicals

(d) Valency

(e) Periodic table