Question

Atomic number of a few elements are given below
10, 20, 7, 14

1. Identify the elements
2. Identify the Group number of these elements in the Periodic Table
3. Identify the Periods of these elements in the Periodic Table
4. What would be the electronic configuration for each of these elements?
5. Determine the valency of these elements

Answer 1

1. The given elements are neon, calcium, nitrogen and silicon.
2. Neon - group number 18, calcium - group number 2, nitrogen - group number 15 and silicon - group number 14.
3. Neon - 2nd period, calcium - 4th period, nitrogen - 2nd period and silicon - 3rd period.
4. Neon - 2, 8
   Calcium - 2, 8, 8, 2
   nitrogen - 2, 7
   silicon - 2, 8, 4
5. Neon - valency is 0, calcium - valency is 2, nitrogen - valency is 3, silicon - valency is 4.