Module 2

Question 1

E =

Answer 1

-R_h • Z² • (1/n)²

Question 2

Electron Volt

Answer 2

The energy gained by an electron falling through a potential difference of exactly 1 volt.

Question 3

Delta E =

Answer 3

R_h• Z² • [(1/n_initial)² - (1/n_final)²]

Question 4

r =

Answer 4

(0.529 Å) • n²/Z

Question 5

Principle Quantum Number :

Answer 5

n = 1, 2, 3, 4. . .

Question 6

Azimuthal Quantum Number:

Answer 6

l =O, 1. . . .(n-1)

Question 7

Magnetic Quantum Number: m_l

Answer 7

m_l ranges from -l to +l in integar steps.

Question 8

Spin Quantum Number:

Answer 8

m_s = +1/2 or -1/2

Question 9

Pauli exclusion Principle

Answer 9

No two electrons in the same atom can have the same four quantum numbers.

Question 10

Everything in creation “Strives” to reach its

Answer 10

lowest energy state, called a “ground state.”

Question 11

Hund’s rule

Answer 11

The higher the total spin, the greater the stability of an atom. As a result, for a given value of l, all orbitals corresponding to different values of “ml” must be filled with one electron (ms = +1/2 by convention) before they are filled with a second electron (m_s = -1/2).

Question 12

f = c / (lambda)

Answer 12

f= frequency

c = speed of light

lambda = wavelengh

Question 13

When wavelengh is large

Answer 13

frequency is small. When wavelengh is small, frequency is large.

Question 14

E = h • f

Answer 14

E = energy

h = planck’s constant (6.63 X 10^-24)

f = frequency

Question 15

1 Angstrom =

Answer 15

10^-10 Meters

Question 16

Degenerate Orbitals

Answer 16

Orbitals that have identical energy levels