Question

elements a. b c
mass no. 23. 20. 35
neutrons. 12. 10. 18


write atomic number and electric configuration of ABC

to which groups do abc belong

to which periods ABC belong

which is alkali,noble gas,halogen​

Answer 1

Explanation:

Table given below shows the mass number and number of neutrons in

Elements P Q R S

Mass number 12 20 23 35

Number of neutrons 6 10 12 18

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

Answer 2

Explanation:

Atomic no:

A:11

B:10

C:17

Electronic configuration:

A:2,8,1

B:2,8

C:2,8,7