What are electrons?

What subatomic particles make up the nucleus of an atom?

Who established that "electrons move around the nucleus at fixed distances called orbitals or shells"?

This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.

In Rutherford's famous "Gold Foil" experiment, some particles passed through the foil, some were deflected, and some were bounced straight back. This observation made Rutherford conclude

The cathode-ray tube was used to discover the ____ by ____.

In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back. What did we conclude because of this?

What were J. J. Thomson's major contributions to the atomic theory?

What is the meaning of the greek word "atomos"?

Dalton developed the first scientifically tested atomic theory. (T/F)

Which scientist proposed the "plum pudding model" of the atom?

Who was the first to propose that matter consist of indivisible particle of matter called atoms?