The answer is 2) Its atomic number because that’s what the protons represent
<span>Carbon has different isotopes. What is different between an atom of 12C and an atom of 13C?
Question 7 options:
A.number of protons in the nucleus
B.number of electrons in the atom
C.number of protons and electrons in the atom This is correct.
D.number of neutrons in the nucleus</span>
The answer is:
A. <span>It involves atoms. </span>
