Scientist who establishes that the atom has seven energy levels, each level has a certain amount of electrons, and that when the electron moves to another level, energy is released in packets. The quantum era begins.

• N Bohr

• JJ Thompson

• E Rutheford

• J Dalton

Tags

NGSS.MS-PS1-1

Scientist who proposes that the atom has a nucleus

• JJ Thomson

• E. Rutherford

• Sommerfeld

• Heisenberg

He suggested that the universe was made of Air

• Anaximenes

• Tales

• Democrito

• Heraclito

This atomic model corresponds to

• Thomson

• Rutherford

• Schrodinger

• Bohr

Tags

NGSS.MS-PS1-1

This experment which involved alpha particles that may go across or crash with atom was performed by

• Rutherford

• Schrodinger

• Thomson

• Bohr

The atomic model that can be compared with a muffin or puddin

• Bohr

• Thomson

• Democrito

• Rutherford

This scientist proposed that all atoms of the same type are all equal alongside chemical and physical properties.

• Dalton

• Thomson

• Tales

• Leucipo

Tags

NGSS.MS-PS1-1

Radioactivity was discovered by

• Becquerel

• Goldstein

• Rutherford

• Thomson

Catode Ray Experiment was performed by

• Dalton

• Thomson

• Schrodinger

• Anaximenes

A proton has

• Negative charge

• Positive Charge

• Neutral Charge