Periodic Trends

How do you feel about trends of ionization energy and atomic size on the periodic table?

What direction does ionization energy go in regards to the trend in the periodic table?

• Ionization energy decreases across a period and decreases up a group.

• Ionization energy increases across a period and increases up a group.

• Ionization energy increases across a period and decreases up a group.

• Ionization energy decreases across a period and increases up a group.

Rank the atoms from largest to smallest atomic radius.

Li, C, F

• C, F, Li
• Li, C, F
• F, Li, C
• F, C, Li

What does it mean for an atom to have high ionization energy?

• It's more difficult for an atom to remove an electron

• It's easer for an atom to remove an electron

Rank from lowest to highest ionization energy:

Mg, Si, S

• Mg, Si, S
• Si, S, Mg
• S, Si, Mg
• S, Mg, Si

What element has the highest first ionization energy?

• Al

• Ga

• S

• Se

Atomic size increases as you go down a group and _________ when you go LEFT-to-RIGHT a period.

Rank the atoms from smallest to largest atomic radius.

C, Al, N

• C, N, Al
• Al, C, N
• C, Al, N
• N, C, Al

Rank from lowest to highest ionization energy:

Mg, Ca, Ba

• Ba, Mg, Ca
• Ba, Ca, Mg
• Mg, Ba, Ca
• Ca, Mg, Ba

Metals will typically form into

• anions

• cations