BOND POLARITY

Question 1

what is electronegativity

Answer 1

power of an atom to attract electrons in a covalent bond

Question 2

what happens to electronegativiy across a period

Answer 2

electronegativity increases
increase in nuclear charge and similar shielding
so more attraction between nucleus and bonding electrons

Question 3

what happens to electronegativity down a group

Answer 3

electronegativity decreases
more shielding
bonding electrons further from the nucleus

Question 4

what is a dipole moment

Answer 4

effect of polarity of all the bonds in a molecule
dipoles cancel when both sides are equally electronegative
there is a dipole moment if one end of the molecule is more delta positive and one side delta negative