Chapter 7 Formulae + Constants

Question 1

Orbital constant // Bohr’s Constant

Answer 1

2.178 E-18

Question 2

Speed of light (IN VACUUM)

Answer 2

3.00 E8

Question 3

Planck’s constant

Answer 3

6.626 E-34

Question 4

Rydberg Constant

Answer 4

1.097 E-7

Question 5

Formula for wavelength using speed, mass and planck constant

Answer 5

WVL = h/mv

Question 6

Formula for speed of light (IMP)

Answer 6

C = WVL x Freq.

Question 7

Formula for emission of energy

Answer 7

DELTA E = hv (planck x frequency)

Question 8

Formula for wavelength using emission of energy

Answer 8

WVL = hc/DELTA E

Question 9

Trick for calculation of photon emission (n-n)

Answer 9

Absorption: Bottom - top (B= + )
Emission: Top - Bottom (B= - )

Question 10

Formula for energy of an electron at a given shell

Answer 10

En = -B(Z^2/n^2)

Question 11

How to find L

Answer 11

[0, n-1]

Question 12

How to find ml

Answer 12

[-l,+l]

Question 13

How to find number of orbitals per shell

Answer 13

n^2

Question 14

How to find number of electrons per shell

Answer 14

2n^2

Question 15

n=1 corresponds to

Answer 15

S orbitals

Question 16

n=2 corresponds to

Answer 16

P orbitals

Question 17

n= 3 corresponds to

Answer 17

D orbitals

Question 18

n=4 corresponds to

Answer 18

F orbitals

Question 19

After n=4 what pattern do orbital letters follow

Answer 19

They are alphabetical (n=4=F, n=5=G, n=6=H)

Question 20

Heisenberg Uncertainty Principle

Answer 20

DelX x Del(mv) ⩾h/4pi

Question 21

Relationship between frequency and wavelength

Answer 21

Greater wavelength = lower frequency

Question 22

Relationship between frequency and energy

Answer 22

Greater frequency = greater energy

Question 23

Relationship between wavelength and energy

Answer 23

larger wavelength = lower energy

Question 24

Relationship between colour and energy

Answer 24

Visible light is between ultraviolet and infrared: Violet to red means increasing wavelength, decreasing energy, decreasing frequency

Question 25

The "ground state" of an atom refers to which level?

Answer 25

The valence level (the highest orbital value)

Question 26

What is the shape of L2 orbitals? How many are there?

Answer 26

Cloverleaf (5)

Question 27

What is the shape of L1 orbitals? How many are there?

Answer 27

Dumbbell (3)

Question 28

What is the intensity of light measured in?

Answer 28

Amplitude, A^2

Question 29

How to find amplitude?

Answer 29

(top measurement - bottom measurement)/2

Question 30

What is Planck's energy formula?

Answer 30

E= nhv (where n is number of hv absorbed)

Question 31

What name is given to emissions at n=1?

Answer 31

Lyman

Question 32

What name is given to emissions at n=2?

Answer 32

Balmer

Question 33

What name is given to emissions at n=3?

Answer 33

Paschen

Question 34

What name is given to emissions at n=4?

Answer 34

Bracket

Question 35

What name is given to emissions at n=5?

Answer 35

Pfund