Question

Write electron dot structures of Ca(At no 20) and O(At no 8).
b) Show the formation of calcium oxide by transfer of electrons.
c) Name the ions present in this compound.

Answer 1

Ca = 2, 8, 8, 2 O = 2, 6

(c) (i) Ionic solids are hard solids because of strong electrostatic forces of attraction between the oppositely charged ions.
(ii) In molten state - The electrostatic forces of attraction weaken in fused state or in solution state.Hence ions become mobile and conduct electricity.
In the solid state,the electrostatic forces of attraction between ions in the solid state are very strong and therefore ionic compounds do not conduct electricity.

Answer 2

Answer:

Ca ( atomic number 20) = 2,8,8,2,

O ( atomic number 8) = 2,6

(b) Formation of calcium oxide by transfer of electrons is