FINAL REVIEW -1

What are electrons?

• Negatively charged particles
• Neutrally charged particles
• Positively charged particles
• Uncharged particles

Tags

NGSS.MS-PS1-1

NGSS.MS-PS2-3

An electron moves ___________ the nucleus when it moves to its excited state

• towards
• away from
• inside
• around

Light is emitted when an electron moves from the ________ state to the _________ state

• excited, ground
• ground, excited

Tags

NGSS.HS-PS1-2

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Tags

NGSS.HS-PS1-2

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

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

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

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.HS-PS1-8

The first person to propose a theory about an atom was

• Democritus
• Rutherford
• Dalton
• Aristotle

If electrons in an atom have the lowest possible energies, the atom is in the

• ground state.
• inert state.
• excited state.
• radiation-emitting state.

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Neutrons and Electrons
• Protons, Neutrons and Electrons