Electronegativity, Ionization, & Atomic Radius

The graph above shows the ionization energy values as the elements are arranged on the periodic table. Which conclusion cannot be drawn from the graph?

• The ionization energy drops significantly as you move down a group because the valence electrons are in a shell further from the nucleus.

• The ionization energy increases gradually as you move right across a period because the valence electrons are in a shell further from the nucleus.

• The ionization energy increases gradually as you move right across a period because you are adding more protons.

• The ionization energy increases when the valence electrons are more attracted to the nucleus.

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Which of the following is true for alkaline earth metals as their atomic number increases?

• The atomic radius decreases.
• Ionization energy decreases.
• The number of valence electrons increases.
• The Coulombic attraction increases.

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Which of the following sequences corresponds to a correct trend in ionization energy?

• Cl > S > P > Al
• Sr > Ca > Mg > Be
• Rb > K > Na > Li
• Rb > Sr > I > Xe

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Which of the following is true about a sulfur atom and a chlorine atom?

• Sulfur is larger and has higher ionization energy.
• Sulfur is larger and has lower ionization energy.
• Sulfur is smaller and has higher ionization energy.
• Sulfur is smaller and has lower ionization energy.

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NGSS.HS-PS1-1

Put the following in order of increasing ionization energy:Neon, Lithium, Carbon

• Lithium, Carbon, Neon
• Carbon, Lithium, Neon
• Neon, Carbon, Lithium
• Lithium, Neon, Carbon

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NGSS.HS-PS1-1

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As you look from left to right across a period, electronegativity

• increases

• decreases

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Which of these is most electronegative?

• aluminum

• oxygen

• sulfur

• neon

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As you look down a group, electronegativity

• increases

• decreases

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Which of the following will have a higher electronegativity than arsenic (As)?

• Carbon (C)
• Neon (Ne)
• Antimony (Sb)
• Germanium (Ge)

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Atoms that have a high electronegativity, _______________.

• give up their electrons more easily.
• hold on to their electrons more tightly.
• have more electron shells.