Periodic Trends

The ______________ is the distance from the valence electrons to the nucleus (size of an atom).

In the periodic table, draw two arrows representing the direction that atomic radius increases.

Which element has the greatest atomic radius?

• Carbon (C)

• Lead (Pb)

• Silicon (Si)

• Tin (Sn)

Which element has the greatest atomic radius?

• Sulfur (S)

• Silicon (Si)

• Argon (Ar)

• Sodium (Na)

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Which element has the greatest atomic radius?

• Nickel (Ni)

• Titanium (Ti)

• Calcium (Ca)

• Barium (Ba)

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Reorder the elements from least to greatest atomic radius.

• Sodium (Na)

• Potassium (K)

• Cesium (Cs)

______________ is the energy required to remove an electron from an atom.

In the periodic table, draw two arrows representing the direction that ionization energy increases.

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NGSS.HS-PS1-1

Which element has the greatest ionization energy?

• Chlorine (Cl)

• Sulfur (S)

• Sodium (Na)

• Silicon (Si)

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Which element has the greatest ionization energy?

• Aluminum (Al)

• Indium (In)

• Boron (B)

• Gallium (Ga)

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