term 1

Question 1

name and draw the shape of an orbital in the 3p subshell

Answer 1

dumbell

Question 2

what is the probability of finding an electron in the orbital?

Answer 2

95%

Question 3

state 3 rules of orbital filling

Answer 3

1. each orbital can hold up to 2 electrons with opposite spins
   2.the lowest energy orbital must be filled first
2. orbitals with the same energy must have 1 electron before adding a pair

Question 4

what is the best explanation for the trend in boiling points as u go down halogen group

Answer 4

the induced dipole-dipole forces increase

Question 5

describe the bonding in magneisum and silicon

Answer 5

magnesium has metallic bonds and cations/ positive ions and delocalised electrons
silicon is covalently bonded

Question 6

explain why h2s has a lower boiling point than h20 and h2se

Answer 6

h20 has hydrogen bonding which is the strongest type of bonding and requires more energy to overcome
h2s is lower than h2se because the london forces in h2s are weaker and h2s has fewer electrons so less energy needed to overcome induced dipole- dipole interactions

Question 7

what does electronegativity mean

Answer 7

electronegativity is the ability of an atom to attract a bonding pair of electrons in a covalent bond

Question 8

how to tell if something is polar

Answer 8

• if there are lone pairs
• if there are different charges present
• if there are lone pairs on central atom
  so it is not symmetrical and dipoles do not cancel out

Question 9

what shape and bonding angle does 2 bonding regions make

Answer 9

linear shape, 180 degrees

Question 10

what shape and angle does 3 bonding regions make

Answer 10

trigonal planar, 120

Question 11

what shape and angle does 4 bonding regions make

Answer 11

tetrahderal,109.5

Question 12

what shape and angle does 5 bonding regions make

Answer 12

trigonal bipyramidal, 2 bonding angles 90 and 120

Question 13

what shape and angle does 6 bonding regions make

Answer 13

octahedral shape, 90.