Chapter 1 Atomic Structure

Question 1

E(energy of photon)

Answer 1

hc/wavelength, RH[1/n2-1/n2(final)]

Question 2

h

Answer 2

Planck’s constant=6.626x10^-34j*s

Question 3

c

Answer 3

speed of light in vacuum 3x10^8 m/s

Question 4

Mass number(A)

Answer 4

The sum of protons and neutrons

Question 5

Atomic Weight

Answer 5

The weighted average of all isotopes, and is the number reported on the periodic table.

Question 6

Rydberg unit of energy

Answer 6

(R(H)=-2.18x10^-18 J/electron

Question 7

Heisenberg uncertainty principle

Answer 7

We cannot know both the position and speed of a particle such as a photon, or electron with perfect accuracy

Question 8

Pauli exclusion principle

Answer 8

No two electrons in a given atom can possess the same set of four quantum numbers

Question 9

Principal Quantum Numbers

Answer 9

(n)= used in bohrs model, the energy level of the electron orbitals. Any positive integer. The difference in energy between 2 shells=(1/n(i)^2)- (1/n(f)^2)

Question 10

Second Quantum number

Answer 10

(l) (azimuthal or angular momentum quantum number). Possible values of l=(n-1)=tells you the number of subshells. l=0(s), l=1(p), l=2(d), l=3(f)
maximum number of electrons in subshell =4(l)+2

Question 11

Third Quantum number

Answer 11

m(l) is magnetic quantum number specifying the orbital in a subshell.
s=0, p=-1,0,1, d=-2,-1,0,1,2, f=3

Question 12

Fourth Quantum number

Answer 12

m(s) spin quantum #(+1/2)(-1/2)

Question 13

Aufbau Principle

Answer 13

(building up principle)
each subshell will fill completely before electrons begin to enter the next one.

Question 14

n=l rule

Answer 14

lower energy subshells will fill first

Question 15

Hund’s Rule

Answer 15

Within a given subshell, orbitals are filled such that there are a maximum number of half-filled orbitals with parallel spins.

Question 16

Avogadro’s number

Answer 16

6.02x10^23