Question

The Unstable isotope of hydrogen is a)H-1 b)H-2 c)H-3 d)all of the three​

Answer 1

Answer:

H-3

Explanation:

It is radioactive that's why it is unstable

Answer 2

Option C is the correct answer. H - 3 is the unstable isotope of Hydrogen.

• Isotopes are defined as two or more elements having the same atomic number and different atomic weights.
• Two or more elements having the same number of electrons and protons but having a different number of neutrons is defined as an isotopic series.
• The elements H - 1, H - 2, and H - 3 are defined as isotopes because the atomic number is 1 in all three cases but the atomic weight is different.
• The elements H-1, H-2, and H-3 are called Hydrogen, Protium, and Tritium respectively.
• The number of neutrons in H-1, H-2, and H-3 are 0, 1, and 2 respectively.
• Due to the high count of neutrons in H-3 compared to H-1, the element H - 3 is radioactive and unstable. A radioactive element is comparatively unstable to the non-radioactive element.
• Hence, due to radioactivity the element H - 3 (Tritium) is an unstable isotope of Hydrogen.

Therefore, Option C is the correct answer.