Ionization Energy

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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The bar graph above represents four elements and their respective ionization energies. Based on the organization of the modern periodic table, how would these elements be found on the periodic table?

• They are in the same period with W being furthest left.

• They are in the same period with W being furthest right.

• They are in the same group with W being furthest to the bottom.

• They are in a diagonal line with W being at the bottom right.

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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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Put the following in order of increasing ionization energy:Sodium, Oxygen, Boron

• Sodium, Boron, Oxygen

• Oxygen, Boron, Sodium

• Sodium, Oxygen, Boron

• Oxygen, Sodium, Boron

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Which halogen has the highest ionization energy?

• F

• Cl

• Br

• I

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Which of the following list of elements is in descending order of ionization energy?

• Mg, Na, Ca, K

• Mg, Ca, Na, K

• K, Ca, Mg, Na

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Francium (Fr) has the lowest ionization energy in Group 1 because - 

• it has the smallest number of valence electrons

• it has the greatest atomic mass

• it has the greatest number of protons, so it attracts its electrons the strongest

• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

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Imagine this, James, Benjamin, and Scarlett! You are top-notch scientists on a thrilling space mission. Your mission, should you choose to accept it, is to identify the element from the Boron group (Group 13) in the Periodic Table that would require the least amount of energy to remove an electron from an atom in the zero-gravity environment of space. Which element would that be?

• Thallium (Tl)

• Indium (In)

• Gallium (Ga)

• Boron (B)

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Why does fluorine have a higher ionization energy than iodine?

• Fluorine has a higher electronegativity

• Fluorine has a higher atomic mass

• Fluorine has a smaller atomic radius

• Fluorine has more protons in its nucleus

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The element with the smallest ionization energy in Period 6 is - 

• Rn

• Cs

• Os

• Tm

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