What does the number at the top of the square above tell you about carbon?
carbon has 6 isotopes.
a carbon atom has 6 protons in its outermost energy level.
carbon has an average atomic mass of 6.
a carbon nucleus has 6 protons.

A carbon nucleus has 6 protons.

Explanation:

The Atomic number tells u how many protons are in the nucleus of an atom

Hope this helps!

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