Hydrogen has three isotopes (A), (B) and (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 :

Engineering

Chemistry

Hydrogen Preparation and Properties

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$_{1}^{1} H_{1}^{2} H (D)_{1}^{3} H (T)$

Number of neutrons 0 + 1 + 2 = 3