If an atom has 7 protons, 8 neutrons and 9 electrons, what is the mass number?

asked Nov 5, 2022 137k views

11 votes

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10 votes

Answer:

Its mass number is 15

And this element is nitrogen N

Step-by-step explanation:

Because mass number = number of proton + number of neutrons

So 7+ 8 = 15

Exceptions answered Nov 6, 2022

2.7k points

3 votes

mass = protons + neutrons
7+8 = 15 g

Cherryl answered Nov 11, 2022

3.3k points

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