The electron configuration of an atom is 1s²2s²2p⁶. The number of electrons in the atom is

• 3

• 6

• 8

• 10

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Electron Configuration

What atom matches this electron configuration?

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

• Zinc

• Copper

• Nickel

• Germanium

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Electron Configuration

What is the noble gas shorthand electron for Sulfur atom?

• [Ar] 3p⁴

• [He] 3s²3p⁴

• [Ne] 3s²3p⁴

• [Na] 3s²3p⁴

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Electron Configuration

What atom matches this electron configuration?

[Xe] 6s²5d⁹

• Mercury

• Gold

• Platinum

• Thallium

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Electron Configuration

What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

• 1s²2s²2p⁴

• 1s²2s²2p⁶

• 1s²2s²2p⁶3s²3p⁶4s²3d¹

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Electron Configuration

Which of the following has the smallest atomic radius?

• K

• Na

• Li

• Cs

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Periodic Trends

How many valence electrons does Si contain? (click to see image)

• 14

• 28

• 2

• 4

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valence electrons

How many electrons can the first energy level hold?

• 1

• 2

• 8

• 0

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Electron Configuration

An orbital can at most hold how many electrons?

• 1 electron

• 2 electrons

• 3 electrons

• 4 electrons

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Orbital diagrams

What is the highest occupied energy level?

• 1

• 2

• 3

• 4

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Electron Models