Question

Write Lewis structures that obey the octet rule for each of the following.

a. HCN

b. PH₃

c. CHCI₃

d. NH₄⁺

e. H₂CO

f. SeF₂

g. CO₂

h. O₂

i. HBr

Answer 1

(a) HCN

Step: 1 Total valance electrons

Step: 1 Arrange the atoms with single bonds

Step: 3 distribute the remaining pair of electrons

(b) PH₃

Total valance electrons are

(c) CHCl₃

Total valance electrons

Arrange the atoms with single bonds

Distribute the remaining pairs on the atoms to participate octet configuration

(d)

(1) Total valance electrons

(2) Arrange the atoms with single bonds

(3) Distribute the remaining electrons to participate the acted configuration.

(e) H₂CO

Step: 1 Total valance electrons

Step: 2 arrange the atoms with single bonds by using electron pairs

Step: 3 distribute the remaining electron pairs.

(f)

Step: 1 Total valance electrons

Step: 2 arrange the atoms with single bonds.

Step: 3 distribute the remaining electron on each atom to get noble gas electron configuration

(g) CO₂

Step: 1 Total number of electrons

Step: 2 arrange the atoms with single bonds.

Step: 3 Distribute remaining electrons to get noble gas configuration for every atom.

(h) O₂

Step: 1 Total number of electrons

Step: 2 arrange the atoms with single bonds.

Step: 3 Distribute remaining electrons

(i) HBr

Step: 1 Total valance electrons

Step: 2 arrange the elements with single bonds.

Step: 3 distribute the remaining electrons