B., the mass of the nucleus of the atom.
Both the protons and the neutrons are inside the nucleus. The atomic number of an atom is the number of protons, and if you subtract the atomic number from the atomic mass you can find the number of neutrons an atom has.
So, the mass of the protons plus the mass of the neutrons, which are both inside the nucleus, equals the atomic mass.
I think its energy (I just think)
Answer:
A. He sent a cathode ray between electrically charged metal plates
Answer:
is a qualitative ordinal scale characterizing scratch resistance of various minerals through the ability of harder material to scratch softer material.
Explanation:
Answer:
thomson's experiments with cathode ray tubes that showed that all atoms contain tiny negatively charged subatomic particles or electrons.