Polar bonds and polar molecules

what is a polar molecule

a molecule in which the charges are unevenly distributed- one part positive, other negative

how does electronegativity affect a polar bond

greater difference in electronegativity = more polar bond

polar molecules have...

unequal sharing of electrons, permanent dipoles

non polar molecules have...

equal sharing of electrons, no permanent dipole

what makes a molecule non polar

is symmetrical, 1 type of element, only Carbon and Hydrogen

for a bond to be polar, what does the electronegativity difference have to be equal to or greater than?

0.5

what is a dipole

charge separation in polar molecules

what makes a molecule symmetrical

- all atoms attached to the central atom must be the same

- no lone pairs

if all arrows balance

non polar as dipole moment = 0