History of Atom

Who proposed the 'plum pudding' model of the atom?

• Thomson

• Bohr

• Rutherford

• Dalton

Who first came up with the idea of an atom and called them "atomos"?

• Democritus

• Rutherford

• Thomson

• Bohr

 

Which experiment discovered the nucleus of the atom?

• cathode ray tube

• gold foil experiment

• heisenberg's uncertainty principle

• flame test experiment

What is the charge of a neutron?

• -

• both + & -

• neutral

• +

Where are the electrons located?

• in the middle of the atom

• in areas that contribute to the atom's mass

• outside the nucleus

• inside the nucleus

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

• Ernest Rutherford
• James Chadwick
• Democritus
• Niels Bohr

Proposed that electrons move around the nucleus in specific layers, or shells.

• Bohr

• Rutherford

• Chadwick

• Thomson

This picture best represents ___________________ atomic model.

• Thomson's

• Dalton's

• Bohr's

• Chadwick's

Who developed the planetary model of the atom?

• Niels Bohr

• Ernest Rutherford

• John Dalton

• Democritus

Democritus was known for

• discovering the electron

• discovering the proton

• creating the term atom, meaning indivisible

• discovering the nucleus