Atomic Physics

This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.

• The "Bohr Model" of the atom

• The "Rutherford Model" of the atom

• The "Plumb Pudding Model" of the atom

• The "Quantum Mechanical Model" of the atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

• The "Plum Pudding Model" of the atom

• The "Rutherford Model" of the atom

• Democritus's model of the atom

• The "Quantum Mechanical Model" of the atom

Ernest Rutherford discovered that atoms were mostly _________________. 

• negatively charged

• positively charged

• electrons

• empty space. 

In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back.  What did we conclude because of this?  

• Atoms are small indivisible spheres

• Atoms are mostly empty space with a small, dense, positive center

• Atoms have negatively charged particles which orbit the nucleus

• Light is a wave, not a particle

In order of most to least penetrating radiation we have

• Alpha , Beta,  Gamma

• Beta , Gamma , Alpha

• Gamma, Beta, Alpha

• Gamma, Alpha, Beta

Tags

NGSS.HS-PS1-8

A particle with a positive charge that determines the element

• proton

• nucleus

• neutron

• electron

This equation shows how mass and the speed of light convert to energy

• E=mc

• E=mc²

• E=mc³

• E=m

How many neutrons does a Hydrogen atom have?

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-1

Discovered the electron using cathode ray tube

• Joseph Thomson

• John Dalton

• Ernest Rutherford

• Robert Millikan

Idea was of an indivisible particle of matter he called "atomos"

• John Dalton

• Aristotle

• Democritus

• Plato