Electronegativity/Polarity

Electronegativity is...

• the strength of an atom to pull electrons from another element

• the ability of an atom to lose electrons

• the energy required to remove an electron from a specific atom

• the strength of an atom to share electrons with another element

Large differences in electronegativity result in __________ bonding between atoms.

• Covalent

• Mettalic

• Ionic

• Hydrogen

Hydrogen has an electronegativity of 2.20, fluorine an electronegativity of 3.98. What sort of bond do they form?

0-0.4 = nonpolar; 0.41-1.7 = polar covalent; 1.71+ = ionic

• mostly ionic

• polar covalent

• mostly covalent

• nonpolar covalent

Which has the greater Electronegativity:

N or C?

• C

• N

Which has the greater Electronegativity:

H or F?

• H

• F

Put these in increasing order of electronegativity:

F, N, B (smallest on left; largest on right)

• B < N < F

• B < F < N

• N < F < B

• F < N < B

A bond with a partially negative end and a partially positive end is (as opposed to completely negative and completely positive):

• ionic

• polar

• non-polar

• isometric

A diatomic molecule like O₂ is always_______ because electrons are shared ________.

• pure covalent; equally

• polar; equally

• nonpolar; unequally

• nonpolar; equally