Atomic Model

Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• Albert Einstein

Tags

NGSS.HS-PS1-3

Who discovered that the atom had an small, dense, positively charged center?

• Ernest Rutherford

• J.J Thomson

• Robert Millikan

• John Dalton

In the atomic model nicknamed the "plum pudding" model, what do the plums represent?

• the nucleus

• the atom

• the electrons

• the positive material

Tags

NGSS.MS-PS1-1

Place the following atomic models in order, from earliest to latest:

• B, C, A

• C, A, B

• A, C, B

• C, B, A

Tags

NGSS.MS-PS1-1

Which scientists believed an atom was indivisible? (Choose all correct responses.)

• Democritus

• Dalton

• Thomson

• Rutherford

Tags

NGSS.HS-PS1-7

How did Rutherford come up with his atomic theory?

• Testing gamma rays against dogs

• Testing alpha rays of radiation against gold foil

• Testing zinc against silver

• Testing zinc against gold

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

Label the following subatomic particles.

c

b

a

Neutron

Positron

Proton

Electron

Tags

NGSS.MS-PS1-1

Name this element.

• Argon

• Chlorine

• Aluminum

• Boron

Tags

NGSS.MS-PS1-1

What is the atomic number of this atom?

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1