Question

Carbon has an atomic number of 6. Which of the following does the atomic number 6 tell you about carbon?

Answer 1

The atomic number only tells you how many protons an element has, regardless of the amount of neutrons etc.

Carbon 6 therefore has 6 protons, and that's the only thing you can deduce from its atomic number.

Answer 2

Carbon 6 has six protons and six neutrons. Carbon 14 has 6 protons and eight neutrons in it's nucleus