A mass number of an atom is equal to the:
A. number of protons in the nucleus of the atom
B. number of electrons and protons in the atom
C. number of neutrons and protons in the nucleus of an atom
D. number of neutrons in the nucleus of an atom
Answer:C
A mass number of an atom is equal to the:
A. number of protons in the nucleus of the atom B. number of electrons and protons in the atom C. number of neutrons and protons in the nucleus of an atom D. number of neutrons in the nucleus of an atom