Another carbon isotope has six protons and seven neutrons in its nucleus. what do you think this carbon isotope is called?

C-13 isotope

Explanation:

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

For carbon : number of protons = 6

number of neutrons = 7

Thus Atomic number = 6

Mass number = 7+ 6= 13

Thus isotope is called as carbon-13 isotope.

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