JEE Main 20208 Jan, Evening shiftChemistryEasyAtomic Structure113× since 2002
Hydrogen has three isotopes (A), (B) and (C).
If the number of neutron(s) in (A), (B) and (C)
respectively, are (x), (y) and (z), the sum of (x),
(y) an (z) is :
JEE Main 2020 · 8 Jan, Evening shift · Q2141