Atom Review

Which scientist discovered the electrons?

• Dalton

• Thomson

• Atristotle

• Bohr

Bohr discovered that electrons are located in

• the nucleus

• inside protons

• electron cloud

• circular orbits around the nucleus

What is a particle with one negative charge called?

• electron

• proton

• quark

• neutron

What is a particle with one positive charge called?

• proton

• electron

• neutron

• quark

What is the center of an atom called?

• nucleus

• electron cloud

• proton center

• photon center

What is the neutral particle found in the nucleus called?

• proton

• neutron

• electron

• quark

All matter is made of

• energy

• atoms

• electrons

• compounds

In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.

• Atoms
• Parts
• Molecules
• Hydrogen

The atom is mostly large empty space with a small, dense nucleus at the center

• Dalton

• Thomson

• Rutherford

• Bohr

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811