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4 votes
What is the mass number of an element that has 8 protons, 9 neutrons and
7 electrons?

2 Answers

3 votes
so the answer to your question will be 16
User Dira
by
4.9k points
4 votes

Answer:

17

Step-by-step explanation:

mass number = # of protons + # of neutrons

User Zet
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4.2k points