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An atom has 7 protons and 7 neutrons. What is its mass number?Question 10 options:049114

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The mass number of an atom is the sum of the number of protons and neutrons in its nucleus.

In this case, the atom has 7 protons and 7 neutrons.

So, the mass number = number of protons + number of neutrons = 7 + 7 = 14.

Therefore, the mass number is 14.

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