9/25 class notes

Question 1

in the H atom, which emits a photon of higher energy and why
-electron transition from n=6 to n=4
or
-electron transition from n=5 to n=3

Answer 1

electron transition from n=5 to n=3 because larger gap between lines, bluer light, more energy

Question 2

how does probability distribution describe an electron in an atom

Answer 2

as an orbital (mathematically it is the square of the wavelength)

Question 3

what two things do orbitals have

Answer 3

1)specific energy
2)specific energy 3D shape (90%) prob electron found enclosed volume)

Question 4

what are the four quantum numbers that describe elctrons

Answer 4

1)principal, n
2)Angular momentum l
3)magnetic quantum number, ml
4)spin, ms

Question 5

according to principlal as n increases

Answer 5

orbital size increases and orbital energy

Question 6

how to find angular momentum (l)

Answer 6

l<=n-1

Question 7

as l increases

Answer 7

orbital energy increases but not as dramatically as n (only true for atoms with two or more electrons)

Question 8

when l = 0 what is the shape of the orbital and what is its letter

Answer 8

sphere
s

Question 9

when l = 1 what is the shape of the orbital and what is its letter

Answer 9

dumbbell
P

Question 10

when l = 2 what is the shape of the orbital and what is its letter

Answer 10

clover leaf
d

Question 11

when l = 3 what is the shape of the orbital and what is its letter

Answer 11

dont draw
f

Question 12

when l = 4 what is the shape of the orbital and what is its letter

Answer 12

dont draw
g

Question 13

how to find ml

Answer 13

-l<=Ml<=l

Question 14

what does magnetic quantum number provide

Answer 14

info on the orbitals directionality in space

Question 15

what two ways can it spin

Answer 15

up or down
+1/2 or -1/2

Question 16

pauli exclusion principle

Answer 16

No two electrons can have the same four quantum numbers in an atom, cannot put third electron in unique n, l, ml