Periodic Trends Two Options

Which of these statements is an accurate description of the ionization energies of elements in the periodic table?

• The ionization energy of lithium is greater than that of potassium.

• The ionization energy of iodine is greater than that of fluorine.

• The ionization energy of magnesium is greater than that of sulfur.

• The ionization energy of krypton is greater than that of neon.

The atomic radius of magnesium is 150 pm. The atomic radius of strontium is 200 pm. What is the atomic radius of calcium?

• smaller than 150 pm

• greater than 200 pm

• between 150 and 200 pm

• not enough information

Li has an ionization energy of 520 kJ/mol. F has an ionization energy of 1680 kJ/mol. Which of the following is a possible explanation for the trend?

• Fluorine has strong attractive forces between the nucleus and the electrons. It takes more energy to remove an electron from fluorine than lithium.

• Each electron on an atom has a set amount of energy. Since fluorine has more electrons, then it will have more ionization energy than lithium.

• Lithium has a smaller atomic radius than fluorine. It takes less energy for an electron to be added to the outer energy level on lithium than the outer energy level on fluorine.

• Ionization energy increases down the periodic table and decreases across the periodic table.

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Which element has the largest atomic radius?

• a

• b

• c

• d

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Which of these elements is the most electronegative?

• argon

• chlorine

• phosphorus

• sulfur

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Argon, chlorine, aluminum and sulfur are found in Period 3 of the periodic table.

– Order the elements argon, chlorine, aluminum, and sulfur from least electronegative to

most electronegative.

• Al, Ar, Cl, S

• Al, S, Cl, Ar

• Ar, Cl, S, Al

• Ar, Al, S, Cl

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Which element is most likely to ionize by losing two electrons?

• beryllium

• helium

• lithium

• oxygen

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Which statement best describes the name and location on the Periodic Table of the elements with the highest and lowest electronegativity, respectively?

• Helium, on the upper right, has the highest electronegativity, and Francium, on the lower left, has the lowest electronegativity.

• Fluorine, on the upper right, has the highest electronegativity, and Francium, on the lower left, has the lowest electronegativity.

• Neon, on the upper right, has the highest electronegativity, and Francium, on the lower left, has the lowest electronegativity.

• Hydrogen, on the upper left, has the highest electronegativity, and Radon, on the lower right, has the lowest electronegativity.

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Which of the following elements has the largest atomic radius?

• Calcium

• Sodium

• Potassium

• Magnesium

Which statement below accurately describes the elements in Group 16 of the Periodic Table as considered from top to bottom?

• The atomic radii decrease and the ionization energies increase.

• The atomic radii increase and the ionization energies decrease.

• The atomic radii decrease and the ionization energies decrease.

• The atomic radii increase and the ionization energies increase.

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