Atomic Theory

This particle is found in the nucleus and has no charge

• Neutron
• Proton
• Electron
• Orbital

This is a negatively charged particle found outside the nucleus

• Electron
• Proton
• Neutron
• Orbital

Tags

NGSS.MS-PS2-3

The first person to propose a theory about an atom was

• Democritus
• Rutherford
• Dalton
• Aristotle

Some atoms are large enough to see with your eyes.

• True
• False

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.

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

Tags

NGSS.HS-PS1-3

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. 

All matter is made of what?

• Energy 
• Atoms 
• Electrons 
• Compounds 

Subatomic particle that has a negative charge and is located outside of the nucleus.

• Electron
• Proton
• Neutron
• Voltron

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

• True
• False