An atom has net charge of -1. It has 18 electrons and 20 neutrons. Its

1.	An atom has net charge of -1. It has 18 electrons and 20 neutrons. Its mass number is
A.	37
B.	35
C.	38
D.	20
Answer» B. 35

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An atom has net charge of -1. It has 18 electrons and 20 neutrons. Its mass number is

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