Periodic Trends – AP Chemistry

1. Which element has the highest electronegativity?

Oxygen Chlorine Fluorine Nitrogen

2. Going down Group 1 (alkali metals), atomic radius:

Decreases Stays the same Increases First increases, then decreases

3. Sodium (Na) has a much lower ionization energy than Neon (Ne). Why?

Na has fewer protons Na's outer electron is in a new, higher-energy shell (n=3) Na has more electrons total Ne is a noble gas