Question

Complete the following statements by selecting the
correct option:

(a) The formula of a compound represents :-

(i) an atom (ii) a particle
(iii) a molecule (iv) a combination.

(b) The correct formula of aluminium oxide is :-

(i) AlO3 (ii) Al02 (iii) Al2O3 (iv) Al302.

(c) The valency of nitrogen in nitrogen dioxide (NO2) is :-

(i) one
(ii) two
(iii) three
(iv) four.​

Answer 1

Answer:

a. an atom

b. al2o3

c. four