Unit 2 - Structure of the Atom Practice

The three subatomic particles are

• proton, neutron, electron

• proton, nucleus, electron

• protein, neutron, electricity

• proton, neutral, electives

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NGSS.MS-PS1-1

99.9% of the atom's mass is found where?

• nucleus

• protons

• electron cloud

• neutrons

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Electrons are

• negative

• positive

• neutral

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NGSS.MS-PS2-3

Protons are

• negative

• positive

• neutral

Neutrons are

• negative

• positive

• neutral

When an atom contains more electrons than protons, it is

• a neutral atom with no charge

• an ion and negatively charged

• an ion and positively charged

• an isotope and has more mass

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NGSS.MS-PS1-1

When an atom contains more neutrons than another atom, it is

• a neutral atom with no charge

• an ion and negatively charged

• an ion and positively charged

• an isotope and has more mass

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The nucleus is ____________ charged.

• positively

• negatively

• neutral

The area around the nucleus of an atom where the atom's electrons are most likely to be found is called

• electron cloud

• quark

• electron

• nucleus

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NGSS.MS-PS1-1

If a carbon atom has six protons and has a mass of 13 amu, how many neutrons are in that carbon atom?

• 5

• 6

• 7

• 8

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NGSS.MS-PS1-1