Help me match this up, please? (8th grade chemistry)

Words to use:
atomic mass, protons, column, electrons, atomic number, neutrons, row, 11, 23

A. The _______________ ___________________ of an element is used to determine the number of neutrons.

B. The atomic number can be used to calculate the number of _____________________ and ___________________ in an element

C. Elements found in the same_____________________ have similar chemical properties.

A. Atomic number
B. Protons, Neutrons
C. Column