Atomic Theory

This contains most of the mass of an atom

• Electron Cloud
• Nucleus
• Electron

Tags

NGSS.MS-PS1-1

The first person to ever talk about an atom was

• Democritus
• Rutherford
• Dalton

How did Rutherford discover the proton?

• Cathode tube ray experiment
• Gold Foil Experiment
• Planetary Model
• Plum Pudding Model

Tags

NGSS.HS-PS1-8

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.  
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

Tags

NGSS.MS-PS1-1

Place the following scientists in order, from earliest to latest: 
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton

• B,C,A
• C,A,B
• A,C,B
• C,B,A

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

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

An atom's overall charge is ________.

• positive 
• depends
• neutral 
• negative 

True or False: The majority of an atom is made up of empty space

• True
• False

Tags

NGSS.MS-PS1-1

The majority of an atom's mass exists where?

• In the nucleus
• In the electron cloud
• In the space between the nucleus and the electrons
• In the neutrons

Tags

NGSS.HS-PS1-8