An element has 5 stable isotopes. The mass and percentage of each are: 89.9043 51.46%
90) 9053 11.23%
91) 9046 17.11%
93) 9061 17.40%
95) 9082 2.80%
The element is which of the following?
A) Nb
B) Y
C) Sr
D) Zr
E) Rb
Correct Answer:
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