Chemistry, asked by harshitdhio333, 6 months ago

what are the isotopes of helium

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Answers

Answered by sakshipathak1221
0

Explanation:

Although there are nine known isotopes of helium (2He) (standard atomic weight: 4.002602(2)), only helium-3 (3

He

) and helium-4 (4

He

) are stable. All radioisotopes are short-lived, the longest-lived being 6

He

 with a half-life of 806.7 milliseconds. The least stable is 5

He

, with a half-life of 7.6×10−22 s, although it is possible that 2

He

 has an even shorter half-life.

Answered by Anonymous
1

Answer:

Element “Helium” has two stable isotopes (3He and 4He) and six radioactive ones (5He, 6He, 7He, 8He, 9He, and 10He).

Explanation:

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