Unit 3 Review - Physical Science

The smallest unit of a pure substance that has the properties of that substance

• element
• atom
• neutron
• compound

Atoms are made up of three basic parts, which are -

• Protons, neutrons, electrons
• neutrinos, protons, neutrons
• quarks, protons, electrons
• electrons, neutrons, and quarks

The nucleus is made up of -

• neutrons and electrons
• protons and neutrons
• protons and electrons
• electrons and quarks

Protons have this charge -

• positive
• negative
• neutral
• no charge

Electrons have this charge - 

• positive
• negative
• neutral
• no charge

Neutrons have this charge -

• positive
• negative
• neutral
• They don't exist

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

The first person to propose a theory about an atom was

• Democritus
• Rutherford
• Dalton
• Aristotle

What scientist first developed 4 rules for atomic theory, and helped kick start modern chemistry?

• J.J. Thomson
• Ernest Rutherford
• John Dalton
• Democritus