Comparison of sizes
Which of the following is the smallest in size?
Se2-
Na
Li+
Li+
How many unpaired electrons does Se have?
2
Which elements can expand their octet?
3rd row and below
How do we know if a molecule is polar or nonpolar?
If central atom surrounded symmetrically by identical atoms, the molecule is nonpolar. (The dipoles all cancel...)
Arrange from least polar molecule to most polar molecule:
H-C , H-F, H-H, H-N, H-O
H-H, H-C, H-N, H-O, H-F
Which has the largest atomic radius?
Ge
Rb
Sn
In
Rb
What is the condensed electron configuration of the following ions?
Y3+
Rb+
Se2-
[Kr]
Draw the Lewis structure of BCl3
see board
Is BrCl4- polar or nonpolar?
Nonpolar
Which of the following does not have a node at the nucleus?
s
p
d
f
s
Ionization energy __________ [increases/decreases] across a period (from left to right) in the periodic table.
Ionization energy __________ [increases/decreases] down a group (from top to bottom) in the periodic table.
Ionization energy increases across a period
Ionization energy decreases down a group
What is the condensed electron configuration of Cu?
[Ar]3d104s1 or [Ar]4s13d10
What is the Lewis structure and formal charge of S in SF5-?
Formal charge of S = -1
In the equation ABnEn what do the variables represent?
A: Central atom
B: Bonding domains
E: Nonbonding domains
n: how many there are
Which of the following are free radicals?
OH
CO2
O2-
H2O
CH3
OH, O2-, CH3
Which of the following molecules has the highest ionization energy?
Na
Ne
Al
O
Ne: Neon is a noble gas in Group 18 and has the highest ionization energy of all the elements listed. This is because it has a full outer shell (octet), meaning its electrons are tightly bound to the nucleus, making it very difficult to remove an electron.
What is the condensed electron configuration of Pb (element 82)
[Xe] 6s24f145d106p2 or [Xe] 4f145d106p26s2
What is the lewis structure and formal charges of SO3?
see board
What is the electron domain geometry and the molecular domain geometry of ClF4+?
Electron domain: Trigonal Bipyramidal
Molecular domain geometry: see saw
What do the following quantum values represent?
Principal quantum # (n)
l
ml
n: energy shell and relative orbital size (size)
l: shape of orbital and subshell
ml: orientation of orbital around nucleus (orientation in space)