Classify each of the following on the basis of their atomicity. (a) F2 (b) NO2 (c) N2O (d) C2H6 (e) P4 (f) H2O2 (g) P4O10 (H) O3 (i) HCl (j) CH4 (k) He (l) Ag

Answer:

Atomicity can be defined as the total number of atoms that composes a molecule. Simply put, it is the no of atoms present in a molecule.

  • Monatomic is a combination of two words “mono” and “atomic” means a single atom. The noble gases are monatomic gases as they are unreactive in nature which is a property of these gases.
  • Diatomic molecules are those molecules that are composed of only two atoms.
  • Triatomic molecules are those molecules that are composed of three atoms.
  • A polyatomic ion is also known as a molecular ion that is composed of two or more covalently bonded atoms. It is also referred to as a radical.

Monoatomic 

Diatomic

Triatomic

Polyatomic

He

F2

NO2

C2H6(8 atoms)

Ag

HCl

N2O

P4(4 atoms)

O3

H2O2(4 atoms)

P4O10(14 atoms)

CH4

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