AP Chem 8,9,10
In the Lewis structure for NO+, what is the formal charge on the N atom?
0
How many of the following species are paramagnetic Ac 3- Cl Ba 2+ Se
1
The Phosphorus atom in PCl3 would be expected to have
a partial (+) charge
Identify an ionic bond
Electrons are transferred
Electron configuration of [Xe] 6s2, 4f7
Eu
Which ion does not have a noble gas configuration in its ground state? Al 3+ Sc 3+ As 3- Ga 3+
Ga 3+
Which molecule or compound below contains an ionic bond? C2Br4 CO2 SiI4 OCl2 NH4NO3
NH4NO3
Identify the compound with metallic bonding He NaBr S Na H2O
Na
Identify the substance that conducts electricity Ethanol NaCl Dissolved in water Sugar dissolves in water Solid NaCl Solid Sugar
NaCl dissolved in water
Using periodic trends, place the following bonds in order of increasing ionic character S-Cl Se-Cl O-Cl
O-Cl < S - Cl < Se - Cl
Place the following in order of increasing atomic radius As O Br
O<Br<As
Most stable? OCN- , ONC- , NOC
OCN-
Place the following in order of decreasing atomic radius Xe, Rb, Ar
Rb>Xe>Ar
Place the following in order of decreasing radius Te 2- F- O 2-
Te 2- > O 2- > F -
3 bonding groups 1 lone pairs
Tetrahedral electron geometry Trigonal pyramidal molecular geometry
2 bonding groups 2 lone pairs
Tetrahedral electron geometry bent molecular geometry
4 bonding groups 0 lone pairs
Tetrahedral electron geometry tetrahedral molecular geometry
How do core electrons effect outer electrons
They shield the nuclear charge from the center.
4 bonding groups 1 lone pair
Trigonal bipyramial electron geometry Seesaw molecular geometry
3 bonding groups and 0 lone pairs
Trigonal planar electron geometry Trigonal planar molecular geometry
2 bonding groups 1 lone pairs
Trigonal planar electron geometry Bent molecular geometry
Condensed electron configuration of krypton?
[Ar] 4s2, 3d10, 4p6
Neutral electron configuration of Se
[Ar] 4s2,3d10,4p4
How many of the following species are diamagentic Fr Zr 2- Al 3- Hg 2+
2
Number of core electrons for Se
28
How many unpaired electrons are present in a neutral As atom
3
Identify the number of bonding pairs and lone pairs of electrons on N2
3 bonding pairs and 2 lone pairs
What is the maximum number of f orbitals that are possible?
7
Which atom in each group has the smallest atomic radius? (I) Ba, Hf At (II) As, Sb, Bi
At and As
Place the following elements in order of increasing electronegativity Ba Se Li
Ba < Li < Se
Use lewis theory to determine the chemical formula for the compound formed between Ba and N
Ba3Na2
Which of the following is an exothermic process NaF --> Na + + F- Br + e- --> Br- Li --> Li Cl2 --> 2Cl
Br + e- ---> Br-
Choose the bond below with the weakest bond Br-Br C-N C-N Na-Br Li-I
Br-Br
Which molecule or compound below contains a PURE covenant bond Br2 PCl3 NaCl Li2CO3 SCl6
Br2
Choose the bond below that is the most polar Cl - Cl N - O C - N C - F C - C
C - F
Place the following in terms of increasing bond length: C-F , C-S, C-Cl
C-F < C-Cl < C-S
Which molecule or compound below contains a polar covalent bond AgI C2H4 LiI NCl3 ZnS
C2H4
Place the following in order of decreasing magnitude of lattice energy KF CaS RbI
CaS>KF>RbI
Which compound has the lowest melting point according to the ionic bonding model LiCl LiF CsI KBr RbI
CsI
When filling degenerate orbitals, electrons fill them singularly at first, with parallel spins known as
Hund's rule
List these compounds in decreasing electronegativity difference F2 HF KF
KF > HF > F2
Best lewis structure for BeF2
Lewis structure for BeF2
Which of the following have their valence electrons in the same shell? He, Ne, F Li, N, F N, As, Bi B, Si, As
Li, N, F
Which iconic compound would be expected to have the highest lattice energy? LiBr LiI LiCl LiF
LiF
2 bonding groups and 0 lone pairs
Linear electron geometry Linear molecular geometry
The electronegativity is 2.1 for H and 1.9 for Pb. Based on this, PbH4 would be expected to have..?
non-polar colvalent bonds with partial negative charges on the H
What element has this electron configuration? [Ar] 4s2, 3d3
vanadium