HISTORY OF AN ATOM

Who was the first person to come up with the Atomic Theory?

• John Dalton
• Democritus
• Ernest Rutherford
• Niels Bohr

Who developed the Quantum Mechanical Model?

• Erwin Schrodinger
• Joseph Thomson
• James Chadwick
• Ernest Rutherford

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

• Ernest Rutherford
• James Chadwick
• Democritus
• Niels Bohr

Who discovered the electron?

• Niels Bohr
• Democritus
• Joseph Thomson
• John Dalton

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

Who discovered the electron

• Rutherford

• Thomson

• Millikan

• Dalton

Developed an atomic theory of matter.

• Chadwick

• Millikan

• Rutherford

• Dalton

Used cathode rays to experiment with atoms.

• Rutherford

• Dalton

• Thomson

• Millikan

The scientist that discovered a positive center of an atom.

• Millikan

• Rutherford

• Dalton

• Thomson

Tags

NGSS.HS-PS1-8

Used alpha particles to discover the nucleus

• Thomsan

• Becquerel

• Millikan

• Rutherford

Tags

NGSS.HS-PS1-8