Question

the number of neutrons in the nucleus of an atom can be calculated by?
A. adding together the numbers of electrons and protons

B. subtracting the number of protons from the number of electrons

C. Subtracting the number of protons from the mass number

D. adding the mass number to the number of protons

Answer 1

i believe its C.

i learned by M-A=N    or     MAN

Mass- Atomic number ( or the number of protons ) = Number of nuetrons

Answer 2

subtracting the number of protons from the mass number. i took the test