A_7: Atom Test Review 2

Most of an atom's mass is made up of what sub-atomic particles?

• electrons and protons

• electrons and neutrons

• neutrons and positrons

• neutrons and protons

Which subatomic particle has no charge?

• proton

• neutron

• electron

A student is making a model of an atom and chooses a proton to be a ball that has a mass of 1g. What would the mass of the electron be if he wanted to keep the same scale? Remember they're tiny! Math tip: Divide each fraction to see what they are as a decimal.

• 1g

• 5 g

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NGSS.MS-PS1-1

Which two particles both have a large mass?

• electron and neutron

• proton and electron

• proton and neutron

Which conclusion was a direct result of the gold foil experiment?

• An atom is mostly empty space with a dense, positively charged nucleus.

• An atom is composed of at least three types of subatomic particles.

• An electron has a positive charge and is located inside the nucleus.

• An electron has a very large mass.

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NGSS.HS-PS1-8

An experiment in which alpha particles were used to bombard thin sheets of gold foil led to the conclusion that an atom is composed mostly of

• empty space and has a negatively charged nucleus

• empty space and has a positively charged nucleus

• uncharged charged nucleus

Tags

NGSS.MS-PS1-1

Which statement describes the distribution of charge in an atom?

• A) A neutral nucleus is surrounded by one or more negatively charged electrons.

• B) A neutral nucleus is surrounded by one or more positively charged electrons.

• C) A positively charged nucleus is surrounded by one or more negatively charged electrons.

• D) A positively charged nucleus is surrounded by one or more positively charged electrons.

The gold foil experiment led to the conclusion that each atom in the foil was composed mostly of empty space because most alpha particles directed at the foil

• passed through the foil

• remained trapped in the foil

• were deflected by the nuclei in gold atoms

• were deflected by the electrons in gold atoms

Tags

NGSS.MS-PS1-1

The neutral particle in an atom.

• proton

• neutron

• electron

Which of the labeled structures is an electron?

• a

• b

• c

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NGSS.MS-PS1-1