1. Compared to carbon-14, what does the nuclide carbon-12 have less of?
A. protons
B. nuetrons
C. energy levels
D. bonding configurtions

What would happen if carbon-14 gained 1 proton and lost 1 nuetron?
A. It would stay carbon-14
B. It would become carbon-13
C. it would become nitrogen-14
D. It would become nitrogen-13

What would happen if bismuth-208 lost 1 proton and gianed 1 nuetron?
A. It would become lead-207
B. It would become lead-208
C. It would become bismuth-207
D. It would stay bismuth-208

The nucleus of an atom has __.
A. only protons
B. only nuetrons
C. protons and nuetrons
D. protons, nuetrons, and electrons