rutherford

According to Ernest Rutherford, an atom is made of mostly....

• empty space
• electrons
• the nucleus
• protons

The _____________ determines the identity of an object.

• # of Protons
• # of Electrons
• # of Neutrons
• Atomic Mass

Tags

NGSS.MS-PS1-1

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

• Ernest Rutherford
• Heisenberg
• Democritus
• JJ Thomson

Tags

NGSS.HS-PS1-8

How do scientists know how atoms are structured?

• By looking under a microscope
• By running experiments that expose their properties
• By examining only the largest atoms
• By splitting them apart

Tags

NGSS.HS-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

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

Who discovered the nucleus using the gold foil experiment?

• Democritus
• Robert Millikan
• James Chadwick
• Ernest Rutherford

How did Thomson build upon Dalton's model? 

• His model was the same.
• He put electrons in orbitals.
• He discovered the nucleus.
• He discovere subatomic particles (electron).
  

Who's model is this? 

• Millikan
• Rutherford
• Thomson
• Bohr

Tags

NGSS.MS-PS1-1

Which of the following statements are true about the nucleus?

• It is neutrally charged

• It is positively charged

• It contains most of the mass of the atom

• It is almost empty space

Tags

NGSS.HS-PS1-8