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Unit 2 Review
Unit 2 Review
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Questions
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Answers
1
Which is the smallest? Se
2-
/ Sr
2+
/ Br
-
/ Rb
+
/ Kr
Se2-
Br -
Rb+
Sr2+
2
What is the name of this hydrocarbon?
Pentene
Pentacarbon Decahydrogen
Pentane
2-pentene
3
How many valence electrons does sulfite have?
22
24
26
20
4
What atom has the smallest atomic radius?
S (Sulfur)
Ca (Calcium)
Cs (Cesium)
Na (Sodium)
5
How many grams are contained in 0.560 mol of phosphate ion?
32 grams
95 grams
53 grams
44 grams
6
Which atom is the most electronegative?
F (Fluorine)
P (Phosphorus)
N (Nitrogen)
Li (Lithium)
7
Which of the following formulas/charges is WRONG?
Chlorate: ClO3-
Nitrite: NO2-
Permanganate: MnO42-
Sulfate: SO42-
8
N
2
is an ionic bond
False
True
9
What is the formula of the compound formed between Sn
2+
and NO
2
-
Sn2NO2
Sn(NO2)2+
SnNO2+
Sn(NO2)2
10
Which compound has greater lattice energy?
CaO
LiBr
11
The following pictures show the resonance structure of the nitrate ion. Why doesn’t this structure have polarity?
None of the bonds are polar
The molecular geometry
It is polar
Resonance eliminates polarity
12
What is the molecular geometry of BF
3
Tetrahedral
Trigonal Planar
Triangle
Bent
13
What is the name of this molecule?
Hexasulfur fluoride
Sulfur fluoride
Sulfur Hexafluoride
14
How many grams of oxygen are contained in 75.0 g N
2
O
4
?
16 grams
3 grams
52 grams
4 grams
15
This chemical structure is the most stable form of N
2
O
True
False
