Chemistry 103 Chapter 8 Chemical Bonds

Polar bonds form between any two dissimilar atoms that have different electronegativity values. C-Se, C-O, and N-H are polar, while Cl-Cl, O=O, are non-polar because they have identical bonded atoms. C-H is non-polar because the have negligible difference in electronegativity.

The lower the difference in electronegativity between the bonded atoms, the less polar the bond. O=O is non-polar; therefore, it is the least polar.

Non-polar, or purely covalent. Ex: Br-Br

The bond is polar covalent Ex: O-H with O being more electronegative with a negative charge.

The bond is ionic. Na-Cl

ionic, covalent, hydrogen, metallic

valence electrons

Pair of electrons shared between two atoms in a covalent bond

two atoms sharing on pair of electrons

pair of electrons that is not shared.

two pairs of electrons shared between two atoms

sharing three pairs of electrons between two atoms.

unequal sharing of bonding pair of electrons between atoms, which results in unequal distribution of charge. it is partial negative and partial positive.

ability of an atom to attract electrons

true

true

FC = the number of valence electrons - (the number of bonds to atom (lines) + the number of unshared electrons)

single>double>triple

energy required to break one mole of covalent bonds in the gas phase.

true

true