MOLECULAR POLARITY vs. BOND POLARITY
~ refers to the equal (______________) or unequal (______________) sharing of electrons
~ What makes a bond polar (covalent)?
* If the bond occurs between two _____________________ nonmetals
~ refers to the symmetry (______________) or asymmetry (______________) of a molecule
~ What makes a molecule asymmetrical?
* If there are ______________________________________ around the central atom.
* If the surrounding atoms are different ____________________________________
POLAR MOLECULE WITH POLAR COVALENT BONDS
unshared e- pair on central atom makes the molecule polar
bond is between 2 different nonmetals – so bond is polar covalent
WITH POLAR COVALENT BONDS
no unshared e- pairs on central atom
bond is between 2
AND surrounding atoms are same different nonmetals, so bond
element, so molecule is NONPOLAR. is polar covalent
Special Cases Regarding Molecular Polarity:
~ When there are only 2 atoms in the compound or ion…
* examples: F2 or HF