The modern atomic model is based on principles of what?

Greek philosophers who studied the smallest particles of matter was called

Who discovered the Nucleus

The positively charged particle in the nucleus of an atom is

The passage of electric current through a gas helped Thomson discover

The orbits (energy levels) of the atom was discovered by

Subatomic particles are made of what?

The number of protons in the nucleus of an atom is called the

The sum of the protons and neutrons in the nucleus is called the

The atomic number is equal to the number of....

The center of the atom is called the

When atoms of the same element have differing number of neutrons they are called

The subatomic particle that is neutral

The negatively charged particle of the atom is called the

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