1. Electronegativity

2. Electronegativity is the ability of an atom in a compound to attract electrons.

3. Electronegativity values tend to decrease from top to bottom and increase from left to right.

4. Which element in each pair has a higher electronegativity value?
Mg or Ne Mg

5. Which element in each pair has a higher electronegativity value?
Cl or F F

6. Which element in each pair has a higher electronegativity value?
C or N N

7. Which element in each pair has a higher electronegativity value?
As or Ca Ca

8. Cs has one of the lowest electronegativity values.

9. Valence (outer) electrons may be transferred from one atom to another.
Group
Valence elctrons
Resulting charge 1A
Lose 1 1+ 2A
Lose 2 2+ 3A
Lose 3 3+ 5A
Gain3 3- 6A
Gain 2 2- 7A
Gain 1 1-

10. What charge would Na likely have in a compound? _______1+
What charge would Mg likely have in a compound? _______ 2+
What charge would Al likely have in a compound? _______ 3+

11. What charge would O likely have in a compound? _______2-
What charge would F likely have in a compound? _______ 1-