Periodic Table Trends

What is the definition for atomic radius?

• The distance from the nucleus to the valence orbital

• The tendency of atoms to attract bonded pairs of electrons

• The energy change by adding an electron

• The rings around the nucleus

How does atomic radius change as you move across a period (from left to right)?

• It increases

• It stays the same

• It decreases

• There is no way to know

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Which of the noble gases has the smallest atomic radius?

• He

• F

• Ar

• Rn

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What is a valence electron?

• An electron inside the nucleus.

• An electron on the innermost ring.

• An electron on the outermost ring.

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Halogens have ________ valence electron(s)

• 1

• 2

• 7

• 8

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How many valence electrons are in a full valence (stable) shell?

• 1

• 4

• 8

• 10

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How does ionization energy change as you move across a period?

• It increases

• It stays the same

• It decreases

• There is no way to know

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Ionization energy is the energy

• required to remove two electron

• required to remove three electrons

• required to remove four electrons

• required to remove one electron

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Which has the highest ionization energy?

• Iron

• Fluorine

• Chlorine

• Calcium

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What is electronegativity?

• Ability for an atom to pull an electron towards itself

• Ability of an electron to attract other electrons

• Ability of a proton to attract an electron

• None of the above

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