Question

How to write the formula for Calcium nitride?

Answer 1

Writing the formula of Calcium nitride

• Step 1: Identify the constituent elements

1. Calcium nitride is an inorganic compound with constituent elements Calcium (Ca) and Nitrogen (N).

• Step 2: Finding the valency of the constituent elements

1. Electronic configuration of Ca (20) = 2,8,8,2
   Number of valence electrons in Ca = 2
   Valency of Ca = +2
2. Electronic configuration of N (7) = 2,5
   Number of valence electrons in N = 5
   Valency of N = -3

• Step 3: Formation of Chemical formula

1. Using the cris-cross method
   $\underset{2}{\mathrm{Ca}}\underset{3}{N}$

• The formula of the compound comes out to be ${\mathrm{Ca}}_3{\mathrm{N}}_2$

Hence, the formula of Calcium nitride comes out to be ${\mathrm{Ca}}_3{\mathrm{N}}_2$.