Atomic theory History of the atom

Which Scientist said, Everything is made of tiny particles surrounded by empty space

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

Tags

NGSS.MS-PS1-1

Which Scientist said, matter is made of earth, wind (air), water and fire

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

Which Scientist said, matter made of atoms that can not be created or destroyed

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

Tags

NGSS.HS-PS1-7

Which Scientist said, Uniform spheres of positive charges surrounded by electrons.

• Democritus

• Aristotle

• John Dalton

• JJ. Thompson

Which Scientist performed the Gold foil experiment. Determined that Atoms are mostly empty space with a nucleus.

• Ernest Rutherford

• Niels Bohr

• John Dalton

• JJ. Thompson

This Scientist model is the most common. They said electrons orbit nucleus at fixed energy levels

• Ernest Rutherford

• Niels Bohr

• John Dalton

• JJ. Thompson

Uncertainty principle - you can not determine an electron's speed and position at the same time.

• Ernest Rutherford

• Niels Bohr

• Werner Heisenberg

• Erwin Schrodinger

Tags

NGSS.HS-PS4-3

This scientist mathematically determined the position of electron orbits.

• Ernest Rutherford

• Niels Bohr

• Werner Heisenberg

• Erwin Schrodinger

Rutherford's gold foil experiment provided evidence that...

• Negative and positive charges are spread evenly throughout the atom.
• Alpha particles have a positive charge.
• Gold is not a dense as previously thought.
• There is a dense positively charged nucleus at the center of an atom.

Tags

NGSS.HS-PS1-8

J.J. Thomson provided evidence that an atom...

• is the smallest particle of matter
• contains negatively and positively charged particles
• has an overall negative charge
• has an overall positive charge