which element has no isotopes except Nobel gases?
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noble gases are only isotopes but helium is exception in it cause it has 2 electron in its outer most shell
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Answer:
Z Element No. of electrons/shell
2 helium 2
10 neon 2, 8
18 argon 2, 8, 8
36 krypton 2, 8, 18, 8
Explanation:
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