are (X)
Hydrogen has three isotopes (A), (B), (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (X), (Y) and (z), the sum of (x) , (y) and (z) is
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Nov
Hydrogen has three isotopes (A), (B), (C). If the number of neutron(s) in (A), (B) and (C) respectively, are (X), (Y) and (z), the sum of (x) , (y) and (z) is (C). If the number of neutron(s) in (A) are (X) B B and C respectively Hydrogen has three isotopes (A) the sum of [...]