Periodic Trends

How does the size of atoms change as you move across a period on the periodic table?

• Increases

• Decreases

• Stays the same

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Which atom has the lowest electronegativity?

• Lithium (Li)

• Oxygen (O)

• Neon (Ne)

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Which of the following halogens has the greatest electronegativity?

• Chlorine (Cl)

• Bromine (Br)

• Iodine (I)

• Astatine (At)

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Which of the following atoms would have the highest ionization energy?

• Francium (Fr)

• Zinc (Zn)

• Tin (Sn)

• Chlorine (Cl)

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Which element has the smallest atomic radius?

• Lithium (Li)

• Francium (Fr)

• Fluorine (F)

• Radon (Rn)

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Atoms with a small radius tend to have a high ionization energy.

• True

• False

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Which type of ion typically has a larger radius than the neutral atom?

• Anion (negatively charged)

• Cation (positively charged)

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Atoms with a low ionization energy tend to be more electronegative.

• True

• False

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Most of the elements on the periodic table are nonmetals.

• True

• False

Which group of elements has the lowest ionization energies?

• Alkali Metals (Group 1)

• Alkaline Earth Metals (Group 2)

• Halogens (Group 17)

• Noble Gases (Group 18)

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