CHEMISTRY HELP!!! Fluorine is more electronegative than oxygen because?

1. the effective nuclear charge of oxygen is

greater than that of fluorine.

2. the effective nuclear charge of fluorine is

greater than that of oxygen.

3. the outer orbitals of fluorine are located

further from the nucleus than the outer orbitals of oxygen.

4. False; oxygen is more electronegative than

fluorine.

5. the outer orbitals of oxygen are located

closer to the nucleus than the outer orbitals

of fluorine.