Chemistry, 23.08.2019 05:00 maiacheerz
Which of the following isotopes has the same number of neutrons as phosphorus – 21 (atomic number 15)
a. 32/15 p
b. 32/16 s
c. 29/14 si
d. 28/14 si?
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Which of the following isotopes has the same number of neutrons as phosphorus – 21 (atomic number 15...
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