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Who came up with the first atomic theory?

• Dalton

• Socrates

• Thomas

• Rutherford

What did Bohr's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

The word atom comes from a Greek word "atomos" that means

• Invisible
• Indivisible
• Undivided
• Indestructable 

The first person to propose a theory about an atom was

• Democritus
• Rutherford
• Dalton
• Aristotle

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

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

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NGSS.MS-PS1-1

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

Who stated that all atoms of the same element are exactly alike?

• Democritus
• Dalton
• Thomson
• Borh

All matter is made of what?

• Energy 
• Atoms 
• Electrons 
• Compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

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

• Electron
• Proton
• Neutron
• Voltron

Tags

NGSS.MS-PS1-1