The anion X³⁻ has 18 electrons and its mass number is 31. The number of neutrons present in the nucleus is:

Book Online Demo

Check Your IQ

Try Test

Courses

Offline Centres

The anion X³⁻ has 18 electrons and its mass number is 31. The number of neutrons present in the nucleus is:

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

In the nucleus 16 neutrons are present.
Since it is a Anion,it has gain 3 electrons.So no.of electrons in its atom would be

18 - 3 = 15

This means no.of protons are =15
No.of Neutrons = Mass No-No.of protons

= 31 - 15

\Rightarrow

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE