Which scientist proposed that the atom looked like the above image?

• John Dalton

• JJ Thomson

• Ernest Rutherford

• Niels Bohr

Which model below is Dalton's original idea for the atom?

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Tags

NGSS.MS-PS1-1

Which Scientist was the first to propose the idea that atoms are actually mostly empty space?

• JJ Thomson

• Ernest Rutherford

• Niels Bohr

• John Dalton

Thomson believed the atom was a smooth, hard marble with a positive charge. And trapped within this marble were negatively charged particles. Which picture below matches this?

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Tags

NGSS.MS-PS1-1

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.MS-PS1-1

Who stated that electrons move in layers or shells?

• Bohr
• Chadwick
• Rutherford
• Dalton

Who discovered the neutron?

• Dalton
• Chadwick
• Thomson
• Bohr

Ernest Rutherford discovered that atoms were mostly _________________. 

• negatively charged
• positively charged
• electrons
• empty space. 

J.J. Thomson used a cathode ray tube to find what particle in the atom?

• Proton
• Neutron
• Electron

Idea was of an indivisible particle of matter he called "atomos"

• John Dalton
• Aristotle
• Democritus
• Plato