Chemistry SL

What happens to atomic radius as you move from left to right across a period?

• It increases because of the higher number of occupied energy levels.

• They decrease because of the stronger effective nuclear charge.

• They increase because of the weaker attraction of electrons to the nucleus.

• They decrease because of the increased atomic mass.

Which element has a larger atomic radius:

• Sodium (Na)

• Chlorine (Cl)

• Both have the same atomic radius

• None of the above.

Which element has a higher ionization energy?

• Oxygen (O)

• Sulfur (S)

• Both have the same ionization energy

• None of the above.

Compare the electron affinity of Fluorine (F) and Lithium (Li).

• Lithium has a higher electron affinity in comparison to fluorine

• Both have the same electron affinity

• Fluorine has a higher electron affinity in comparison to lithium

Explain why metals tend to lose electrons easily based on their ionization energies

Potassium (K) has a _______ ionization energy than Calcium (Ca).

• Higher

• Lower

Neon (Ne) has a _______ electron affinity than Fluorine (F).

• Higher

• Lower

Aluminum (Al) has a _______ atomic radius than Silicon (Si).

• larger

• Smaller

Cesium (Cs) has a higher metallic character than Magnesium (Mg)

• True

• False

Chlorine (Cl) is more likely to gain electrons than Oxygen (O).

• True

• False