Question

How many atoms are present in a

(i) H 2 S molecule and

(ii) PO 4 3− ion?

Answer 1

Answer:

(i) 3 atoms because H2S molecule has two atoms of hydrogen and one atom of sulphur. (ii) 5 atoms because PO43- ion has one atom of phosphorus and four atoms of oxygen.

Answer 2

Answer:

(1) H2S has 1s and 2H

(1) H2S has 1s and 2Hthat is in a total of 3 atoms.

(1) H2S has 1s and 2Hthat is in a total of 3 atoms.(2) PO4 3− ions has 4 O atoms and 1P atom

(1) H2S has 1s and 2Hthat is in a total of 3 atoms.(2) PO4 3− ions has 4 O atoms and 1P atomthat is in a total of 5 atoms.