Unit 5: Atomic Structure

Identify the atom shown here.

• a neutral atom of beryllium, Be (atomic #4)

• an ion of nitrogen, N (atomic #7)

• a neutral atom of lithium, Li (atomic #3)

• an ion of helium, He (atomic #2)

Tags

NGSS.MS-PS1-1

Identify an atom with 24 protons.

• chromium

• magnesium

• titanium

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How many neutrons are there in a typical atom of arsenic, As (atomic #33)?

• 33 neutrons

• 75 neutrons

• 42 neutrons

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How many neutrons are there in a typical atom of hafnium, Hf (atomic #72)?

• 178 neutrons

• 106 neutrons

• 72 neutrons

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Identify the atom shown here.

• magnesium

• carbon

• lithium

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Tags

NGSS.MS-PS1-1

What's the charge of this magnesium, Mg (atomic #12) ion?

• -2

• neutral

• +2

• -1

Tags

NGSS.MS-PS1-1

What's the charge of this oxygen, O (atomic #8) ion?

• -2

• +2

• neutral

• -1

Tags

NGSS.MS-PS1-1

How many electrons are in a neutral atom of aluminum, Al (atomic #13)?

• 27 electrons

• 14 electrons

• 13 electrons

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How many electrons are in a neutral atom of polonium, Po (atomic #84)?

• 209 electrons

• 84 electrons

• 125 electrons

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How many electrons are in a hydrogen ion with a charge of +1?

• 1 electrons

• 2 electrons

• 0 electrons

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