Gen Chem

Question 1

Energy of an electron

Answer 1

E = -Rh/ n^2

depends on principal quantum # (n)

Question 2

E-mag energy of photons

Answer 2

E = hc/lambda
E = h(f) 

h = planks constant = 6.626 x 10 ^-34

Question 3

Hydrogen emission lines

Answer 3

n >2 –> n=2 Balmer
n >1 –> n=1 Lyman
paschen?

Question 4

Heisenberg uncertainty principle

Answer 4

impossible to determine with perfect accuracy the position and momentum of e- simultaneously

Question 5

Exceptions to octet

Answer 5

H(2), He(2), Li(2), Be(4), B(6)

Question 6

Hunds rule

Answer 6

Electrons fill in order to maximize half-filled orbitals

Question 7

Exceptions to e- configuration

Answer 7

Chromium: 3d5 and 4s1

Copper: 3d 10 and 4s1

more favorable to fill the 3d and deal with incomplete 4s

Question 8

How many e- in shell/subshell/orbital

Answer 8

shell: 2n^2
sub shell: 4l +2
orbital: always 2?

Question 9

VESPR

e = 2

Answer 9

linear
180
non polar?

Question 10

e =3

Answer 10

trigonal planar

120

Question 11

e = 4

Answer 11

tetrahedral

109.5

Question 12

e = 5

Answer 12

trigonal bipyramidal

90, 120, 180

Question 13

e = 6

Answer 13

octahedral
90, 180
SN

Question 14

quantum number n

Answer 14

= shell

value = n

Question 15

quantum number p

Answer 15

= subshell (l)

l values = from (0 to n-1)

Question 16

quantum number ml

Answer 16

= orbital

ml values = from (-l to +l)

Question 17

quantum number ms

Answer 17

= spin

+/- 1/2