milkshakegrande101
19.09.2019 •
Chemistry
The direct vaporization of a solid without passing through its liquid state is called
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Ответ:
208 g/mol and 87 g/mol
Explanation:
Number of protons = 82
Atomic mass = 126 + 82 = 208 g/mol
For ^{87}Sr
Number of neutrons = 49
Number of protons = 38
Atomic Mass = 49 + 38 = 87 g/mol