Question
An atom has net charge of $1 .$ It has 18 electrons and 20 neutrons. Its mass number is(1) 37(2) 35(3) 38(4) 20
Step 1
In this case, the atom has a net charge of 1, which means it has one more proton than electron. Since it has 18 electrons, it must have 19 protons. Show more…
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