Periodic Trends Test Review

In Mendeleev’s periodic table, elements in the same group exhibited similar

• atomic weights.

• neutron number

• chemical properties

• isotopic forms.

Which of the following is NOT a characteristic of alkaline earth metals

• They form ions with a +2 charge.

• They are highly reactive nonmetals.

• They have 2 valence electrons.

• good conductors of heat and electricity.

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In which block of the periodic table are the lanthanides and actinides located?

• s

• p

• d

• f

What does the group number tell you about an atom?

• Valence electrons

• Core electrons

• All electrons

• Inner shell electrons

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Which of the following ions has a different electron configuration than the others?

• Ca²⁺

• Mg²⁺

• Ne

• O²⁻

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Which of the below is true about ion formation?

• when an atom loses an electron, it becomes smaller.

• When an atom gains an electron it becomes smaller.

• When an atom loses an electron, it becomes larger.

What is the primary factor that causes the atomic radius to increase as you move down in the periodic table?

• Increase in atomic mass

• Increase in the number of protons

• Increase in the number of electron shells

• Increase in electron affinity

How does the ionization energy change as the atomic number increases across Period 2?

• The ionization energy generally increases due to increasing nuclear charge.

• The ionization energy generally decreases due to increasing atomic radius.

• The ionization energy remains constant across the period.

• The ionization energy decreases and then increases across the period.

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What is the primary reason for the decrease in ionization energy as you move down a group in the periodic table?

• Because the atomic radius increases.

• Due to stronger nuclear attraction.

• Since outer electrons are more tightly bound to the nucleus.

• As outer electrons are located closer to the nucleus.

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Which of the following elements is the most stable due to its electron configuration?

• Cl

• Ar

• Na

• Mg

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