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SpecialSam
The answer would be 12 because Carbon has 6 Protons, which means that it has the same number of neutrons and electrons.
lazygenius514

Answer:

Atomic number of that atom will be 6.

Explanation:

The number of protons is equal to the atomic number of the element. For this element having 6 protons makes the atomic number 6 and makes the element Carbon. For this element 6 protons and 6 neutrons combine to make an atomic mass of 12 amus.