Chapter 1- Atomic Structure

Question 1

Isotopes of hydrogen

Answer 1

Protium (1 neutron)
Deuterium (2 neutrons)
Tritium (3 neutrons)

Question 2

Fundamental unit of charge (charge of electrons and protons)

Answer 2

1.6 x 10^-19 C

Negative for electrons

Question 3

Size of amu

Answer 3

1.66 x 10^-24

1/12 mass of carbon-12

Question 4

Avogadro’s number

Answer 4

6.02 x 10^23

Question 5

Energy of a quantum

Answer 5

E = hf

Question 6

Plancks constant (h)

Answer 6

6.626 x 10^-34 Js

Question 7

Angular momentum of e-

Answer 7

L = nh/ 2pi

n = principle quantum #

• NOTE: angular momentum only changes as a result of a change in principle quantum #

Question 8

Energy of an electron

Answer 8

E = - Rh / n^2

Rh = 2.18 x 10^-18 J/e

• NOTE: angular momentum only changes as a result of a change in principle quantum # (directly proportional because of negative sign)

Question 9

Electromagnetic energy of photons

Answer 9

E = hc/ (wavelength)

Question 10

Speed of light in a vacuum (c)

Answer 10

3 x 10^8

Question 11

Energy associated with a change in principal quantum number

Answer 11

E = -Rh (1/n2^2 - 1/n1^2)

Negative E emission
Positive E absorption

Question 12

Principal quantum number and equation for the maximum number of electrons within a shell

Answer 12

Denoted by n

2n^2

Question 13

Azimuthal (angular momentum) quantum number and maximum number of electrons within a subshell

Answer 13

Denoted by l and refers to shape and number of sub shells 
0 to (n-1) 

4l+2

Question 14

Magnetic quantum number

Answer 14

Designated by ml

Particular orbital the subshell is in

Integers between -l and +l, including 0

Question 15

Spin quantum number

Answer 15

Denoted by ms

Can only be + or - 1/2

Question 16

lyman, balmer, and paschen series

Answer 16

transition from higher energy orbital to (typically in hydrogen atom)….
L- 1
B- 2 (balmer series is only in visible light range)
P- 3