Chp. 4 Review- Atomic models

A belief that matter is made of separate, discreet particles

• continuous theory of matter

• atomism

• law of definite proportions

• law of multiple proportions

Tags

NGSS.MS-PS1-1

Masses of elements can combine to form a particular ratio that can be reduced to small, whole numbers

• the continuous theory of matter

• atomism

• law of definite proportions

• law of multiple proportions

JJ Thompson concluded that atoms contain small, negatively charged particles called

• protons

• neutrons

• electrons

• notions

Credited with the discovery of the proton

• Bohr

• Chadwick

• Rutherford

• Thomson

Credited with the discovery of the neutron

• Bohr

• Chadwick

• Rutherford

• Thomson

Tags

NGSS.HS-PS1-8

Ernest Rutherford theorized that atoms are mostly _______ with his famous gold foil experiment.

• positive

• negative

• empty space

• made of the nucleus

Dalton's model suggested that atoms are like...

• solid spheres

• planets orbiting the sun

• orbital clouds surrounding a nucleus

• plum-pudding

Which of the following shows what J.J. Thompson thought an atom looked like?

• 
• 
• 
• 
• 

Answer explanation

Thompson discovered negative electrons. He knew that atoms were neutral, so he thought that negative electrons were stuck throughout the positive matrix of an atom. Electrons were the negative raisins (chocolate chips) in a positive plum pudding (cookie).

What subatomic particles make up the nucleus of an atom?

• electrons

• protons

• neutrons

• leptons

• mesons

Tags

NGSS.HS-PS1-8

Discovered that the atom has a small, dense, positively charged nucleus.

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

Tags

NGSS.HS-PS1-8