atomic theory/mole

In an atom, electrons move in definite orbits around the nucleus.

• Thomson
• Rutherford
• Bohr
• Democritus

What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged. 
• He discovered that every element consisted of one type of atom that couldn't be divided. 
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

Tags

NGSS.MS-PS1-1

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.MS-PS1-1

He discovered the electron using cathode ray tube experiment.

• Joseph Thomson
• John Dalton
• Ernest Rutherford
• Robert Millikan

Who's model is this? 

• Millikan
• Rutherford
• Thomson
• Bohr

Tags

NGSS.MS-PS1-1

How did each model of the atom help to develop the atomic theory? 

• Each model provided opinions that were added.
• Each model showed different properties of the same structure. 
• Each model showed new particles that had been discovered.
• Each model built upon the other to show new particles or properties of previously discovered particles. 

Tags

NGSS.MS-PS1-1

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Tags

NGSS.MS-PS2-3

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Tags

NGSS.HS-PS1-8

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

Atoms of the same element with a different number of neutrons

• Ion
• Gluons
• Isotope
• Quarks

Tags

NGSS.HS-PS1-8