Configuration 1
What is the electron configuration for Molybdenum, Mo?
1s^2 2s^2 3s^2 3p^6 4s^2 3d^10 4p^2 5s^2 4d^4
What four letters represent the sublevels?
s, p, d, f
What is the noble gas notation of Cl?
[Ne] 3s^2 3p^5
What does the mass, in g, of one mole of atoms of one element called?
Molar mass.
If a light wave's frequency triples, then how does the wavelength change?
1/3.
What is the noble gas notation of Palladium, Pd?
[Kr] 5s^2 4d^8
How many orbitals does the 7th energy level contain?
49.
Which element would be expected to have a half-filled 6p subshell?
Bismuth.
What is the average atomic mass of La?
138.91 amu.
If a wavelength of a light doubles, how does the energy of a photon change?
Halves.
How many valence electrons does Al have?
3
Which element or elements have 6 valence electrons?Ca, S, Br, Cr.
S
Which elements have three unpaired electrons in the 4d orbitals?
Nb and Pd.
What does a quantum of energy depend on?
Frequency.
Which element has the most valence electrons, Ti, Fe, or Cu?
Which orbitals are the valence electrons of noble gas Xe in?
5s^2 5p^6
How many electrons can the 9th energy level take?
2*81 = 162
What is the element that has half-filled 4f orbitals?
Eu
How many unpaired electrons does Zr have?
2.
Which rule does the electron configuration violate?1s^2 2s^2 2p^6 3s^1 3p^5
the Aufbau principle.
What are the four quantum numbers? What do they describe?
Principle quantum number -- main energy level
Angular momentum quantum number -- Shapes of orbitals
Magnetic quantum number -- Orientations of orbitals
Spin quantum number -- Spin states of electrons
How many d orbitals are in the 9th energy level?
5
How many valence electrons does La have?
2
Describe photoelectric effect.
If a light shines on the surface of a metal surface, electrons in the metal are able to absorb the light and be freed from the metal.
If metals tend to lose valence electrons, how many electrons would Ca tend to lose? And which element does its electron configuration looks the same with after losing electrons?
2; Ar.