Chemistry, asked by liyasaseendran3, 11 months ago

which of the following is radioactive
1) Na23
2)K39
3)K40
4) Ca40

Answers

Answered by 20180029983

4

Answer:

K39 and K40

Explanation:

2)K39

3)K40

this is a right answer of this question

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Answered by deepaksoni2012002

3

Answer:

he is right please mark as brilliant

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