Quantum Numbers/PT Nomenclature
Aufbau, Pauli, Hund's
Electron Config/Magnetism
ENC & Shielding
Periodic Trends
100
Elements with similar properties are typically found
a) same group
b) same period
c) opposite sides of PT
d) diagonal on PT
a) same group
100
For any atom, how many electrons can occupy the 3d orbital?
10
100
What is the electron configuration of a Fluorine atom? (write the full configuration, NOT noble gas)
1s22s22p5
100
What is the ENC experienced by a 2p electron in an F- anion?
7
100
What is the trend for atomic radius as you move from bottom left to top right of the periodic table?
Atomic radius decreases
200
What does quantum number "ℓ" tell us?
orbital shape
200
Which of the following represents Aufbau Principle?
a) no 2 electrons can have the same quantum numbers (must have opposite spin)
b) electrons in degenerate orbitals will put 1 electron in each orbital before pairing up
c) electrons fill the lowest energy levels first
c) electrons fill the lowest energy levels first
200
What is the electron configuration of a Selenium atom? (Noble gas)
[Ar] 4s23d104p4
200
What is the ENC of a valence electron in the Al+ cation?
3
200
Rank the following isoelectronic series in order from LARGEST to SMALLEST ionic radii:
Na+, N-3, Mg+2, O-2, F-1
N-3, O-2, F-, Na+, Be+2
300
What are the boundary conditions for mℓ?
+ to - of ℓ value
-3, -2, -1, 0, 1, 2, 3
300
Which of the following represents Pauli Exclusion Principle?
a) no 2 electrons can have the same quantum numbers (must have opposite spin)
b) electrons in degenerate orbitals will put 1 electron in each orbital before pairing up
c) electrons fill the lowest energy levels first
a) no 2 electrons can have the same quantum numbers (must have opposite spin)
300
What ion of Sulfur would have the electron config below?
1s22s22p63s23p6
S-2
300
How many shielding electrons are there in a Mg atom?
10
300
Rank the following from LEAST to GREATEST ionization energy: Si, P, S
Si < S < P
400
Allowed or not allowed quantum numbers?
n= 1, ℓ = 3, mℓ = 0, ms = -1/2
NOT allowed
ℓ = n -1
400
Which of the following represents Hund's Rule?
a) no 2 electrons can have the same quantum numbers (must have opposite spin)
b) electrons in degenerate orbitals will put 1 electron in each orbital before pairing up
c) electrons fill the lowest energy levels first
b) electrons in degenerate orbitals will put 1 electron in each orbital before pairing up
400
Which of the following atoms would be diamagnetic?
K, Al, Mg, Cl
Mg
400
How many shielding electrons are there in a Br- anion?
28
400
Order the following in order of INCREASING electronegativity:
C, P, S, F
P, S, C, F
500
How many electrons could be described by the quantum numbers n = 2, ms = +1/2
4
500
Correct or Incorrect?
INCORRECT - violates Hund's rule
500
Which of the following would you predict to be the most magnetic?
Sc, Ti, V, Mn
Mn
500
Which of the following is NOT isoelectronic with the other ions?
H-2, Be+1, Na+8, Li+1
Li+1
500
Which of the following elements is the MOST electronegative?
K, Cs, Li, Na
Li