Polarisation

Question 1

What is electronegativity?

Answer 1

the power of an atom to attract a bonding pair of electrons in a covalent bond

Question 2

describe non polar bonds - 3 points

Answer 2

1. have equal electronegativities
2. no charges on each side
3. forms a symmetrical distribution of electron density around the 2 atoms

Question 3

describe polar bonds - 3 points

Answer 3

1. different electronegativities
2. imbalance in charges
3. forms an unsymmetrical distribution of electron density = dipole-dipole

Question 4

how can ionic and covalent bonds be a scale for electronegativity

Answer 4

ionic - big difference in electronegativity - more polar bond
covalent - less polar bonds - small difference in electronegativity

Question 5

what are polar molecule?

Answer 5

molecules that have a permanent dipole

Question 6

why are molecules containing polar bonds not always polar?

Answer 6

because polarity depends on the overall shape

Question 7

why do non polar molecules has no permanent dipole|?

Answer 7

the charges cancel out each other