bond polarity

Question 1

electronegativity definition

Answer 1

the ability of an atom to attract the bonding electrons in a covalent bond towards itself

Question 2

why would a molecule have polar bonds but not be a polar molecule

Answer 2

if the molecule has polar bonds but is a symmetrical molecule then the bond polarities cancel out

Question 3

what classifies a polar bond

Answer 3

if the electronegativity difference between the atoms in the bond is more than 0.5

Question 4

what 2 features make a polar molecule

Answer 4

polar bonds
asymmetrical molecule

Question 5

structure of explaining shapes of molecules exam question

Answer 5

1 state number of lp and bp
2 ‘electron pairs repel to maximise separation’
3 state shape and bond angle
4 (if there are lone pairs) state lp-lp>lp-bp>bp-bp

Question 6

define a polar covalent bond

Answer 6

the bonding pair of electrons are not shared equally by the two atoms in the bond

Question 7

how are polar covalent bonds formed

Answer 7

the shared electrons are attracted towards the more electronegative atom.
the bonds will have a slight delta positive at one end and a delta negative at the other.

Question 8

what is the bonding continuum

Answer 8

used to understand different types of bonding by observing variations in electronegativity between atoms.

Question 9

non polar covalent bonds electronegativity difference

Answer 9

0-0.5

Question 10

polar covalent bonds electronegativity difference

Answer 10

0.5-2.0

Question 11

ionic bond electronegativity difference

Answer 11

> 2.0

Question 12

how does electronegativity difference relate to ionic character

Answer 12

increased electronegativity difference means increased ionic character