Ch 7 And Ch 8 (quantum Mechanics)

Question 1

Traveling waves

Answer 1

Radio, microwave

Nodes are moving point having no displacement

Question 2

Spectrum relationships

Answer 2

Higher the frequency, the shorter the wavelength

Question 3

diffraction equation

Answer 3

d(sinx) = n(wavelength)

Question 4

Energy of one photon

Answer 4

E= h(c/wavelength) or h(frequency)

Question 5

Work function (joules per photon)

Answer 5

Work function= h(frequency of one photon) - Kinetic energy of electron

Question 6

Max Kinetic energy of electron

Answer 6

= Elight - E (initial)

Question 7

minimum energy is equal to

Answer 7

E initial= h(threshold frequency)

Question 8

Bohrs model of energy

Answer 8

E= -Z^2 (1/nf^2 - 1/ni^2) Rh

= joules per atom

Question 9

To find energy at ground state or excited state given only one n value

Answer 9

E=-hcRh(1/n^2)

Question 10

The energy to ionize is

Answer 10

nf= infinity in bohrs model equation

Question 11

De broglies wavelength

Answer 11

Wavelength = h/ mv

m=mass in kg
(v= velocity m/s)

Question 12

To find kinetic energy

Answer 12

E=1/2 (mv^2)

m=mass in kg
(v=m/s)

Question 13

(In schrodinger equation) Wave function squared =

Answer 13

Probability of electron location

Question 14

l=0
l=1
l=2
l=3

Answer 14

=s orbital
=p orbital
=d orbital
=f orbital

Question 15

Number of subshells in a shell

Answer 15

=n

Question 16

Number of orbitals in a shell

Answer 16

=n^2

Question 17

of orbitals in a subshell

Answer 17

= 2l + 1

Question 18

n=

l=

ml=

Answer 18

Shell; size, energy of hydrogen

Sub-shell; shape

Orbital orientation

Question 19

Effective Z

Answer 19

Equals the number of electrons in the last shell

Question 20

Zeff , ionization energy and electronegativity increases as you

Answer 20

Go across the periodic table

Question 21

Ionization energy and electronegativity increase you go

Answer 21

Up on the periodic table

Question 22

Radial size increases as you

Answer 22

Go down and to the left on the periodic table

Question 23

Exceptions to ionization energy are

Answer 23

Group 3 and 6
B/c for group 3 2p is higher in energy than 2s so less energy is required to take from 2p.

For group 6 easier to ionize because more stable without the paired electron in 2p subshell. And b/c of electron electron repulsion.

Question 24

Electronegativity trend case is that

Answer 24

Group 2 to 3 there is a big jump in energy. (Row 2 has large energy but row 3 has small energy)

Question 25

Electron affinity exceptions

Answer 25

• Rare gases don’t want to gain
• Group 5 are less willing to gain due to e- pairing
• group 2 doesn’t want to gain chase next e- goes in higher E orbital.

Question 26

Standing waves

Answer 26

Pluck a guitar string

Node is stationary= no displacement

Question 27

Planar nodes =

Answer 27

l value

Question 28

Radial nodes

Answer 28

n-l-1

Question 29

If an ion of +

Answer 29

Take away electrons from higher n value; than go onto the higher l value

Question 30

Valence electrons are

Answer 30

S,p, but not d and f when full.

Question 31

If a ion w/ - charge

Answer 31

Add electrons to last sub shell in electron config