Question

The table given below shows the mass number and the number of neutrons in four elements P, Q, R and S.
Element P Q R S
Mass Number 12 20 23 35
No. of Neutrons 6 10 12 18

(a) Write down the atomic number of P, Q, R, S
(b) Write down the electronic configuration of P, Q, R and S
(c) To which group P, Q, R and S belong?
(d) To which period P, Q, R and S belong?
(e) Which among the above elements is a noble gas, alkali metal and halogen

Answer 1

Explanation:

The table given below shows the mass number and the number of neutrons in four elements P, Q, R and S.

Element P Q R S

Mass Number 12 20 23 35

No. of Neutrons 6 10 12 18

(a) Write down the atomic number of P, Q, R, S

(b) Write down the electronic configuration of P, Q, R and S

(c) To which group P, Q, R and S belong?

(d) To which period P, Q, R and S belong?

(e) Which among the above elements is a noble gas, alkali metal and halogen