Atomic Theory Timeline quiz

Who first came up with the idea of atoms?

• Democritus

• Aristotle

• John Dalton

• JJ Thomson

Who came up with the theory that matter was made of

small, hard, indivisible particles that could not be

divided into smaller pieces?

• Democritus

• Aristotle

• James Chadwick

• Niels Bohr

Who came up with the theory that Negative electrons

are spread through a positive sphere?

• JJ Thomson

• Ernest Rutherford

• James Chadwick

• Niels Bohr

Who discovered the Electron?

• JJ Thomson

• Ernest Rutherford

• Erwin Schrodinger

• Niels Bohr

Who came up with the theory that the atom had a

dense, positively charged Nucleus surrounded

by electrons?

• Ernest Rutherford

• JJ Thomson

• Erwin Schrodinger

• James Chadwick

Tags

NGSS.HS-PS1-8

Who discovered the Nucleus?

• Ernest Rutherford

• JJ Thomson

• John Dalton

• Democritus

Tags

NGSS.HS-PS1-8

Who came up with the theory that electrons travel in specific

circular orbits around the nucleus corresponding to discrete energy levels?

• Niels Bohr

• James Chadwick

• Erwin Schrodinger

• John Dalton

Who created this model?

Plum Pudding Model

• JJ Thomson

• Ernest Rutherford

• John Dalton

• James Chadwick

Who created this model?

Planetary Model

• Niels Bohr

• James Chadwick

• John Dalton

• JJ Thomson

Ernest Rutherford discovered that atoms were mostly _________________. 

• negatively charged
• positively charged
• electrons
• empty space.