Who was the first person to suggest that the atom was made up of smaller parts?
Cathode rays are beams of:
Based on his experiments, what did Rutherford propose?
The proton has:
The neutron has:
The experiment that confirmed the existence of neutrons was performed by:
How many protons are in the helium atom?
The number of protons in an atom is called the:
Which of the following is a valid definition of atomic weight? Atomic weight is:
Which is the correct organization of the subatomic particles in an atom?
The electron has a:
What is the atomic mass of helium?
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