CBSE Class 10 Science 2015 Term II Outside Delhi Set 1

Question : 10

Total: 36

Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.

Solution:

Electronic configuration =2,8,6
Period =3 since it has 3 shells
Group =16 Since numbers of valence electrons are 6.
Valency =8−6=2

Go to Question:

Prev Question

Next Question