Atomic radius DECREASES when

• when you go across a row from right to left

• when you go down a group

• when you go across a row from left to right

• when you go across a group from left to right

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PS.1.A

Put in order from biggest to smallest (decreasing size)

• Zinc

• Bromine

• Calcium

• Krypton

• Iron

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Ionization energy ________________ as you go DOWN a group

• increases

• decreases

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Which atom has larger ionization energy

• aluminum

• sulfur

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Which atom has smaller ionization energy

• strontium

• iodine

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What element is the most electronegative

• chlorine

• bromine

• iodine

• astatine

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What element is the LEAST electronegative

• cadmium (Cd)

• antimony (Sb)

• Zirconium (Zr)

• Strontium (Sr)

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Put these atoms in order from smallest to largest

• carbon atom

• neon atom

• nitrogen atom

• lithium atom

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Which element has properties most similar to those of Lithium?

• Carbon (C)

• Magnesium (Mg)

• Sodium (Na)

• Oxygen (O)

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Which element has properties most similar to those of Fluorine?

• Chlorine (Cl)

• Oxygen (O)

• Calcium (Ca)

• Boron (B)

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PS.1.A