Week 8 Tuesday- you will need to know these topics for the Midterm tomorrow.
Quiz by Kari Stone
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- Q1
There are __________ unpaired electrons in the Lewis symbol for an oxygen atom.
2
1
3
0
4
300s - Q2
The halogens, alkali metals, and alkaline earth metals have __________ valence electrons, respectively.
2, 7, and 4
7, 4, and 6
8, 2, and 3
1, 5, and 7
7, 1, and 2
300s - Q3
For a given arrangement of ions, the lattice energy increases as ionic radius __________ and as ionic charge __________.
decreases, increases
increases, increases
increases, decreases
decreases, decreases
300s - Q4
Given the electronegativities below, which covalent single bond is most polar?
Element: H C N O
Electronegativity: 2.1 2.5 3.0 3.5
N-H
O-N
O-C
C-H
O-H
300s - Q5
The ion has ICl4-__________ valence electrons.
35
28
36
8
34
300s - Q6
The Lewis structure of AsH3 shows __________ nonbonding electron pair(s) on As.
2
1
0
3
300s - Q7
The formal charge on nitrogen in this Lewis structure is __________.
+2
+2
-1
0
+1
300s - Q8
How many equivalent resonance forms can be drawn for CO32- (carbon is the central atom)?
0
4
2
1
3
300s - Q9
Using the table of average bond energies below, the for the reaction is __________ kJ.
Bond: C≡C C-C H-I C-I C-H
D (kJ/mol): 839 348 299 240 413
-217
-160
+63
+160
-63
300s
