Chp 6 - Quantum Theory

Question 1

What is the speed of any wave?

Answer 1

λ (wavelength) x v (freq) = c

Question 2

What is the energy Eq and how can it relate to energy Eq?

Answer 2

E = h x v
h = 6.63E-34 J•s
Both Eq have v in it.

Question 3

Photon has what Eq for kinetic energy?

Answer 3

KE = hv - W
W = Work

Question 4

What is the Bohr model Eq?

Answer 4

E = -R(1/n^2)
R = 2.18E-18
n is quantum whole number

Question 5

2πr = nλ
λ = h/(m•velocity)
M = mass of e-

Answer 5

E

Question 6

Fundamental limitation to how precisely we can know position and momentum of particle at given time.

Answer 6

Uncertainty Principle

Δx - Δ(mv) ≥ h/(4π)

Question 7

What does Schrodinger’s Wave function describe?

Answer 7

-Energy of electron with given ψ
-probability of finding an electron in a volume of space.
Can only be solved for H atoms

Question 8

What is ψ ?

Answer 8

Function of four numbers called quantum numbers

n,l,Ml,Ms

Question 9

What is n in ψ

Answer 9

Principle quantum number. Can only be integers.

Question 10

What is l in ψ ?

Answer 10

Momentum quantum number. Ranges from 0 to n-1

Question 11

What’re the different orbitals?

Answer 11

l=0 s orbital
l=1 p orbital
l=2 d orbital
l=3 f orbital

Question 12

What is Ml in ψ ?

Answer 12

Magnetic quantum number
Can only be -l,0,l
*l=3 -3,-2,-1,0,1,2,3

Question 13

What is Ms in ψ ?

Answer 13

Spin quantum number.

Either (1/2) or -(1/2)

Question 14

90% of electron density is found in which orbital?

Answer 14

1s

Question 15

Define shell subshell and orbital?

Answer 15

Shell- e- w/ same value n
Subshell- e- w/ same l and n
Orbital- e- w/ same n l and Ml

Question 16

What is the speed of light?

Answer 16

c = 3E8 m/s

Question 17

What do s and p orbitals look like?

Answer 17

S- sphere

P- dumbbell

Question 18

Hund’s Rule?

Answer 18

Spreads out the parallels in the electron configuration diagram.

Question 19

Difference between paramagnetic and diamagnetic?

Answer 19

Para- unpaired electron parallels

Dia- all electrons parallels are filled.

Question 20

*Know electron configurations

Answer 20

Woohoo

Question 21

How to find ionization energy of element?

Answer 21

The top right most of periodic table has the most ionization energy.

Question 22

What is a significant jump in ionization energy mean?

Answer 22

The one with biggest jump has the original electrons.

Question 23

How can you tell the size of elements radius. What about ions?

Answer 23

Bottom left most is biggest size. (-) increases size, (+) decreases size

Question 24

How can you tell nuclear charge, Z*?

Answer 24

Closest to 8 valence electrons has highest.

Question 25

Look at last two pgs of notebook

Answer 25

W