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What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons? 21 66 42 45

What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons? 21 66 42 45
asked 16.5k views
3 votes
What is the mass number of an

atom which contains 21 electrons,
21 protons, and 24 neutrons?
21
66
42
45

asked
User Peter Dietz
by
8.1k points

1 Answer

6 votes

Answer:

66 i think

Step-by-step explanation:

because i add 21+21+24=66

answered
User Lilylakshi
by
8.4k points
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