For each of the elements below, there are only two naturally occurring isotopes.Using the atomic masses on the periodic table, identify the pair in which the lighter isotope is the more abundant one.
A) 6Li and 7Li
B) 79Br and 81Br
C) 10B and 11B
D) 126I and 127I
E) 50V and 51V
Correct Answer:
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