Trends of the Periodic Table

Why does K have a larger radius than Na?

• K has more mass

• K has more electron shells

• K has more valence electrons

• K has more protons

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Which element would have a smaller radius?

• Li

• Be

• O

• F

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Which element has the smallest ionization energy?

• N

• P

• As

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Why does sulfur have a greater ionization energy than aluminum? (select all that apply)

• Sulfur has more electron shells

• Sulfur has more valence electrons

• Sulfur has a smaller atomic radius

• Sulfur has less protons

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The ability of an atom to attract electrons is called __________.

• atomic radius

• ionization energy

• electronegativity

Which element has a greater electronegativity value?

• Na

• Cl

• Ar

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Why does iodine have a smaller electronegativity value than fluorine?

• Iodine has a larger radius so it is less difficult to remove electrons

• Iodine has a larger radius so it does not attract electrons easily

• Iodine has a smaller radius so it does not attract electrons easily

• Iodine has a smaller radius so it is less difficult to remove electrons

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Which family of non-metals are most reactive?

• Noble gases

• Halogens

• Alkali metals

• Alkaline earth metals

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Metals want to _____ electrons and are therefore left with a _______ charge.

• gain; positive

• gain; negative

• lose; positive

• lose; negative

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Which element would form a cation and be more reactive?

• Potassium (K)

• Calcium (Ca)

• Selenium (Se)

• Bromine (Br)

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