history of the atom

Who performed the Gold Foil Experiment?

• J. J. Thomson
• Ernest Rutherford
• Neils Bohr
• John Dalton

Bohr's model of the atom was called

• Plum Pudding

• Billiard Ball

• Nuclear Model

• Planetary Model

In 1897, J.J. Thomson used a device like the one shown to discover that cathode rays were

streams of —

• photons

• electrons

• protons

• ions

10. This picture best represents ___________________ atomic model.

• Thomson's

• Dalton's

• Bohr's

• Chadwick's

Who discovered the electron

• Rutherford

• Thomson

• Millikan

• Dalton

Q. Who discovered that the nucleus contains positively charged particles called protons?

• Ernest Rutherford

• James Chadwick

• Democritus

• Niels Bohr

Q. Worked with Rutherford to discover particles with no charge -- called neutrons.

• James Chadwick

• Niels Bohr

• Democritus

• Thomson

Q. Who discovered the electron?

• Niels Bohr

• Democritus

• Joseph Thomson

• John Dalton

What Greek philosopher first spoke about the idea of an atom?

• Democritus
• Dalton
• Thompson
• Rutherford

Q. Matter always has mass.

• True

• False

Tags

NGSS.HS-PS1-7