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Structure & Reactivity
Lewis Dot Structures
Electron Configurations
Trends
EMR and QM
100
Draw the lewis dot structure of NI3 and give the formal charge on N.
0
100
Draw the lewis dot structure of NH3.
:NH3
100
Give three anions that have the electron configuration 1s2 2s2 2p6.
F^-, O^2-, N^3-, etc.
100
When moving down the periodic table, what happens to the effective nuclear charge and why?
It decreases due to more shielding.
100
Going from 460 nm to 120 nm does what to the wavelength, frequency, and energy?
Shorter wavelength, larger frequency, larger energy.
200
How many resonance structures does O3 have?
2
200
Draw the lewis dot structure of ClF3. How many lone pairs are on the central atom?
2
200
Draw out the electrons in the valence shell of a neutral Si atom in it's ground state.
3s2 3p2.
200
Given the ionization energies of Li, C, and Na as 1086, 496, and 520 kJ/mol, which ionization energy belongs to Li?
520 kJ/mol
200
True or false: The uncertainty principle defines the position and momentum of an electron?
False.
300
Draw out H2CCHCHCHCH2CCCHCH2 and indicate the number of multiple bonds.
4
300
Draw the lewis dot structure of N2. What kind of bond does it have?
triple
300
What is the electron configuration of Tl^+?
[Xe]4f14 5d10 6s2
300
Give the following in order of increasing ionic radii: Sr^2+, Sr, Ca^2+, K^+, F^-, O^2-.
F^-, O^2-, Ca^2+, K^+, Sr^2+, Sr.
300
How many electrons can possess this set of quantum numbers: n=5, m(l)=0?
10
400
Rank CaCl2, NaNO3, MgCl2, NaCl, CaO, and SrO in order of decreasing crystal lattice energy.
CaO, SrO, MgCl2, CaCl2, NaCl, NaNO3
400
Draw the lewis dot structure of NO.
.:N=O::
400
Give the electron configuration of Ag^+.
[Kr]4d10
400
Rank the following from least to most polar: Li-H, N-O, H-F.
N-O, Li-H, H-F.
400
To obtain the highest frequency line in the emission spectrum of a hydrogen atom, what would the two energy levels have to be?
n(1)=1, n(2)=infinity
500
Give the lewis dot structure of N2O with the formal charges assigned. What's the formal charge on O?
-1
500
Draw the lewis dot structure of H2NCH3. How many lone pairs are there in the structure?
1
500
How many fewer d and/or s electrons does Cr have than Mn?
1 s electron and no d electrons.
500
Ranks these ions in order of decreasing polarizability: Se^2-, S^2-, Te^2-, O^2-, Po^2-.
Po^2-, Te^2-, Se^2-, S^2-, O^2-.
500
If an electron is in a box of length L and in the first quantum level, what factor would the wavelength increase/decrease if the length triples?
Increases by a factor of 9.