Atomic Theory

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.MS-PS1-1

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

What does the nucleus of an atom contain?

• Electrons and neutrons
• Protons and neutrons
• Neutrinos and positrons
• DNA and RN

Tags

NGSS.MS-PS1-1

What element is pictured?

• Hydorgen
• Boron
• Beryllium
• Arsenic

Tags

NGSS.MS-PS1-1

The _____________ determines the identity of an object.

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

Tags

NGSS.MS-PS1-1

Which scientist realized atoms are mostly empty space?

• Dalton
• Thomson
• Rutherford
• Bohr

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

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

What scientist is best known for his gold foil experiment?

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

What were the conclusions of Rutherford's Gold Foil Experiment?

• The atom is mostly empty space, with positive charge concentrated at the center.

• The atom is mostly empty space, with negative charge concentrated at the center.

• The atom is mostly empty space, with positive charge spread evenly across it.

• The atom is structured like a plum pudding.

Tags

NGSS.HS-PS1-8

What did Rutherford's Gold Foil Experiment involve?

• Firing electrons through gold foil and seeing where they ended up.

• Firing alpha particles through gold foil and seeing where they ended up.

• Firing atoms through gold foil and seeing where they ended up.

• Firing gold atoms through thin foil and seeing where they ended up.

Tags

NGSS.HS-PS1-8