Atomic Structure and Periodic Table Quiz

What are valence electrons?

• Electrons in the innermost energy level of an atom

• Electrons in the nucleus of an atom

• Electrons in the middle energy levels of an atom

• Electrons in the outermost energy level of an atom

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How many valence electrons does an atom of oxygen have?

• 8

• 4

• 2

• 6

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What are energy shells?

• Regions around an atom's nucleus where neutrons are most likely to be found

• Regions around an atom's nucleus where protons are most likely to be found

• Regions around an atom's nucleus where quarks are most likely to be found

• Regions around an atom's nucleus where electrons are most likely to be found

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How many energy shells does an atom of sodium have?

• 7

• 3

• 5

• 1

What is the maximum number of electrons that can be present in the first energy shell?

• 2

• 8

• 6

• 4

What is the maximum number of electrons that can be present in the second energy shell?

• 2

• 8

• 6

• 4

What is the maximum number of electrons that can be present in the third energy shell? [Hint: #e- = 2n^2, where n= # of shells]

• 8

• 2

• 18

• 32

What is the trend of valence electrons across a period in the periodic table?

• Decrease

• Stay the same

• Increase

• Random

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What is the trend of energy shells across a period in the periodic table?

• Number of energy shells decreases

• Number of energy shells increases

• Number of energy shells remains the same

• Number of energy shells varies randomly

What is the trend of valence electrons down a group in the periodic table?

• Valence electrons increase

• Valence electrons remain constant

• Valence electrons fluctuate randomly

• Valence electrons decrease

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