Chemistry: Periodic Groups and Trends

Which element has the SMALLEST atomic radius?

• Barium (Z = 56)

• Nitrogen (Z = 7)

• Calcium (Z = 20)

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True or false: Noble gases are the MOST electronegative elements in their period (row).

• True

• False

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Which element has the LOWEST ionization energy?

• Chlorine (Z =17)

• Selenium (Z = 34)

• Bromine (Z = 35)

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Which element is the LEAST electronegative?

• Aluminum (Z = 13)

• Sulfur (Z = 16)

• Argon (Z = 18)

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True or False? Atomic Radius INCREASES as you move down a group.

• True

• False

Which element is LARGEST in radius?

• Vanadium (Z = 23)

• Manganese (Z = 25)

• Chromium (Z = 24)

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True or False? Ionization energy is the energy required to remove an electron from an atom.

• True

• False

What element has the most orbitals (rings) in a Bohr model?

• Selenium (Z = 34)

• Sulfur (Z = 16)

• Oxygen (Z = 8)

• They all have the same number of orbitals.

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How many valence electrons do alkaline earth metals (Be, Mg, Ca...) have?

• 2

• 4

• 20

• 12

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How many valence electrons does Iodine (Z = 53) have?

• 53

• 17

• 7

• 5

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