The History of the Atom (H)

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 the neutral particle found in the nucleus called?

• proton

• neutron

• electron

• quark

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

• Atoms
• Parts
• Molecules
• Hydrogen

Who was the Greek philosopher who called the smallest particle of matter an "atom"?

• Democritus

• Aristotle

• J.J Thompson

• Einstein

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

• Atom is mostly empty space

• The nucleus is positively charged

• The atom has a small dense nucleus

• All answers are correct

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.

Tags

NGSS.HS-PS1-8

What did James Chadwick discover?

• neutrons
• electrons
• the atomic theory
• protons

The majority of an atom's mass exists where?

• In the nucleus

• In the electron cloud

• In the space between the nucleus and the electrons

• In the neutrons