Biology
Biology, 27.09.2019 06:30, jells16

The atomic number of krypton (kr) is 36, and its mass number is 84. how many neutrons does it have?
a) 18
b) 36
c) 48
d) 72

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The atomic number of krypton (kr) is 36, and its mass number is 84. how many neutrons does it have?...

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