Identify the paris which are not of isot...

Identify the paris which are not of isotopes?

`""_6^12X, ""_6^13Y`

`""_17^35X, ""_17^87Y`

`""_6^14X, ""_7^14Y`

`""_4^8X, ""_5^8Y`

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The correct Answer is:

C, D

are not isotopes because they have different atomic numbers.

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Identify the pairs which are not of isotopes ?

`._(16)^(12)X, ._(6)^(13)Y`

`._(17)^(35)X, ._(17)^(37)Y`

`._(16)^(14)X, ._(7)^(14)Y`

`._(4)^(8)X, ._(5)^(8)Y`

`._(1)^(2)H^(+) and ._(1)^(3)H`

`._(1)^(3)H and ._(2)^(4)H^(-)`

`._(2)^(3)He and ._(2)^(4)He`

`._(6)^(12)C and ._(7)^(14)N^(+)`

oxygen and ozone

ice and steam

nitric oxide and nitrogen dioxid

hydrogen and deuteriu