Question

which is the most active isotope of hydrogen​

Answer 1

Answer:

The nucleus of this isotope consists of only a single proton (atomic number = mass number = 1) and its mass is 1.007825 amu. Hydrogen is generally found as diatomic hydrogen gas H2, or it combines with other atoms in compounds—monoatomic hydrogen is rare...

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Answer 2

Answer:

Isotope

abundance half-life (t1/2)

¹H 99.98% stable

²H 0.02% stable

³H trace 12.32 y