Explain the element x occurs naturally to the extent

Reference no: EM13535253

The element X occurs naturally to the extent of 20.0% superscript 12X and 80.0 % superscript 13X. The atomic mass of X is nearest:

a) 12.2

b) 12.5

c) 12.8

d) 13.0

Reference no: EM13535253

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