Isotope of which noble gas is isotonic (same number of neutrons) with Tritium?

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

$Ne$

$He$

$Kr$

$Rn$

answer is A.

(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

When two elements have same number of neutrons, then it is said to be Isotonic.
The number of neutrons equals to the difference between the mass number of the atom and the atomic number.
Tritium is represented as ${}_{1}^{3}H$ .

Thus the number of neutrons in tritium would be = 3-1=2

Helium is represented as ${}_{2}^{4}{He}$

Thus the number of neutrons in tritium would be = 3-1=2

Therefore, Isotope of which noble gas is isotonic (same number of neutrons) with Tritium is $He$

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE