Question

(a) Write the electron arrangement in (i) a magnesium atom, and (ii) an oxygen atom.

(b) How many electrons are there in the valence shell of (i) a magnesium atom, and (ii) an oxygen atom ?

(c) Name the solvent in which ionic compounds are generally soluble.

(d) Why are aqueous solutions of ionic compounds able to conduct electricity ?

Answer 1

(a) (i) Magnesium -2, 8, 2

(ii) Oxygen – 2, 6

(b) (i) Magnesium = 2

(ii) Oxygen = 6

(c) Water .

(d) An aqueous solution of an ionic compound conducts electricity because there are plenty of free ions in the solution which are able to conduct electric current.