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Atoms

Across
Negatively charged particles are called __________
Atom means _______
The space ______ the nucleus and the electrons is empty space or vacuum
The two types of particles in the nucleus are ______ and neutrons
Down
The center part of an atom is called the ________
Bohr proposed that electrons can only revolve in certain ______ without radiating energy
_________ such as Thompson, Rutherford, and Chadwick discovered subatomic particles
Protons and neutrons have a _______ approximately 2,000 times that of an electron
The rules for filling electrons in the _____ of an atom are called Bohr-Bury's rules