Question

number of
molecule in one
is
of
air
at
STP is
​

Answer 1

Answer:

Your limitation—it's only your imagination

make my answer as brainlist answer

Answer 2

Explanation:

Valency: Valency of an element is determined by the number of valence electrons present in the outermost shell of its atom.

Valency of elements in a particular group is same.

Valency of elements in a period first increases from one to four and then decreases to zero.