Question

an element has atomic number 15 and mass number 31 answer the following find the number of neutrons present in the atom what will be the valency of the atom draw the electronic configuration of the atom​

Answer 1

Answer:

Hello mate

Atomic number = No of protons in atom = 15

No of protons =15

Mass number = 31

Mass = No of proton +neutrons

31=15+ no of neutrons

31-15=16=no of neutrons.

Configuration = 2,8,7

Now it will gain one electron in order to make its shells stable. So it will get negative charge with valency= -1

Answer 2

Answer:

hey mate please refer to the attachment for your answer

Explanation:

attachment..........

hope this helps you........