EMR Spectrum
Which type of EMR photon has the lowest energy and why?
Radio waves - longest wavelength
What is an example of a Paschen-series photon?
n=6 - n=3
n=5 - n=3
n=4 - n=3
An instructor presents the quantum-number set n = 4, ℓ = 2, mℓ = −3, and mₛ = +½. Whats wrong?
mℓ cannot be -3 since ℓ = 2
What is the shorthand electron configuration of Neon (Ne)?
[He] 2s2 2p6
What element in the periodic table has the largest Atomic Radius?
Francium (Fr)
A photon has an energy of approximately 6.9 × 10⁻22 kJ. What is its frequency?
1.04 x 1015 Hz
A photon with a frequency of 4.57 × 1014 Hz is emitted by a hydrogen atom. Which transition produced this photon?
n=3 --> n=2
How many neutrons does an atom of C-13 have?
7 neutrons
What is the full electron configuration of Fe2+?
1s22s22p63s23p63d6
Which species has the largest radius, I-, Sn4- or Xe?
Sn4-
T or F: Beer's Law uses visible light to determine the volume of a solution.
FALSE: It calculates concentration
Which particle has the longest de Broglie wavelength when each is moving at the same velocity?
Electron, proton, atom or molecule?
Molecule
On the periodic table the halogens contains which group?
7A
What is the ground state electron configuration of Copper (Cu)?
[Ar] 4s1 3d10
Rank these elements in order of first ionization energy (lowest-highest): O,N,F,P
P,O,N,F
If a metal allows for lower-energy photons to eject electrons, what must be true?
Low work function
Is this true for the quantum number for hydrogen?
The angular momentum quantum number, ℓ, can have any value between −1 and +1.
no - the range is 0
Which subshell contains the valence electrons of Arsenic, As?
4s and 4p
Which alkaline earth metal has the lowest first ionization energy?
Radium (Rd)
Why does Nitrogen (N) have a higher ionization energy than Oxygen (O)?
The half filled p-subshell
A 2.9 eV photon ejects an electron from a metal with a maximum kinetic energy of 0.9 eV. What is the metal’s work function?
2.0 eV
How many different combinations of the quantum numbers n, ℓ, and mℓ are possible for an electron in the n = 3 shell?
9
What is the difference between the Aufbau rule and Hunds rule?
Aufbau is from bottom to top and Hund is about spacing out orbitals.
In which element does a valence electron experience the greatest effective nuclear charge, Carbon or Chlorine?
Chlorine
If Lithium has an electronegativity of 1, what is the electronegativity of Boron?
2 - they go in 0.5 increments