Atomic Theory

Who came up with the first atomic theory?

• Dalton

• Socrates

• Thomas

• Rutherford

What did Thomson's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

What did Rutherford discover about atoms?

• An atom is always negatively charged.

• An atom is mostly empty space, but has a dense positively charged center(nucleus).

• An atom is always positively charged.

• All particles will pass straight through gold foil with no change in path.

What is a positively charged particle?

• neutron

• electron

• proton

• atom

Tags

NGSS.MS-PS2-3

What is a negatively charged particle?

• neutron

• electron

• proton

• atom

Tags

NGSS.MS-PS2-3

What is a particle with no charge?

• neutron

• electron

• proton

• atom

Who discover the electron?

• Dalton

• Rutherford

• Thomson

• Bohr

What does atom mean?

• small

• visible

• indivisible

• particle

Tags

NGSS.MS-PS1-1

Rutherford's "gold-foil" experiment using alpha particle scattering concluded that

• the center of the atom is empty

• atomic mass is spread over the whole atom

• the center of the atom has a negative charge

• most of the atom is empty

Tags

NGSS.HS-PS1-8

In which model are atoms imagined as the solar system?

• Dalton

• Bohr

• Rutherford

• Cloud Model