Question

Write the name of the element and valency having atomic number 13 14 and 15?
Answer​

Answer 1

Answer:

The electronic configuration of the element are as follows : <br> p (Z = 12), 2, 8, 2 Q (Z = 13) 2, 8, 3 <br> R (Z = 14) , 2, 8, 4 S (Z = 15) 2, 8, 5 <br> (i) The valency of the element Q is 3 since it has three valence electrons. <br> (ii) The elements P and Q are metals while the elements R and S are non-metals. <br> (iii) The element P will form the most basic oxide of formula PO.

Answer 2

Atomic number 13 : Aluminium. Valency : 3
Atomic number 14 : Silicon. Valency : 4
Atomic number 15 : Phosphorus. Valency : 3