Question : The mass number of a nucleus is
A. a fraction
B. always more than the atomic weight
C. the sum of the number of protons and neutrons present in the nucleus
D. always less than its atomic number
Question Listed : Proton, Neutrons, Nucleus, Chemistry,
Question : Almost the entire mass of an atom is concentrated in the
A. neutrons
B. nucleus
C. electrons
D. proton
Question Listed : Nucleus,