1. The Modern Periodic Table

2. Atomic Radii Atomic Radii – size of the atom
Label the smallest and largest atom and add the arrows to the PT in your notes
clip - Reactivity of Alkali Metals

3. Smallest elements
Decreases
Increases
Largest Elements

4. Ionization Energy
Ionization energy (IE) – the amount of energy it takes to remove an electron from a neutral atom
Ion – formed when an atom loses or gains electrons – has a positive or negative charge
Label the PT in your notes like to one on the next slide.

5. Most difficult to remove e-
Increases
Decreases
Easiest to remove e-

6. Electron Affinity (EA)
Ability of an atom to attract electrons
Label the PT in your notes like the one on the next slide.

7. High attraction for e-
Increases
Decreases
Low attraction for e-

8. Electronegativity (EN)
Measure of the ability of an atom in a chemical compound to attract electrons.
Fluorine is the most electronegative element
Label the PT in your notes like to one on the next slide.

9. Strong attraction for e-
Increases
Decreases
Low attraction for e-