Atomic Theory Models

Who had the "Solid Sphere" model of the atom and said atoms could not be divided?

• Democritus

• Dalton

• Thomson

• Bohr

In an atom, electrons move in definite orbits around the nucleus.

• Thomson
• Rutherford
• Bohr
• Democritus

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

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

Tags

NGSS.MS-PS1-1

What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged. 
• He discovered that every element consisted of one type of atom that couldn't be divided. 
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

Tags

NGSS.MS-PS1-1

Place the following scientists in order, from earliest to latest: 
Rutherford, Dalton, Bohr, Thomson

• Dalton, Rutherford, Bohr, Thomson
• Thomson, Dalton, Rutherford, Bohr
• Dalton, Thomson, Rutherford, Bohr
• Bohr, Dalton, Rutherford, Thomson

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 came up with the model of an atom pictured?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

Tags

NGSS.MS-PS1-1

The first person to propose a theory about an atom called the "Atomos Theory" (that atoms are indivisible) was

• Democritus

• Rutherford

• Dalton

• Aristotle

Who discovered the nucleus using the gold foil experiment?

• Democritus
• Robert Millikan
• James Chadwick
• Ernest Rutherford

He discovered the negative electron using cathode ray tube experiment (in his model they were studded into a positive "pudding or dough."

• Joseph Thomson

• John Dalton

• Ernest Rutherford

• Robert Millikan