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""(10)Ne^(20) , ""(10)Ne^(21) , ""(10)Ne...

`""_(10)Ne^(20) , ""_(10)Ne^(21) , ""_(10)Ne^(22)` are a set of __

A

a. Allotropes

B

b. Isotopes

C

c. Isobars

D

d. Isotones

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