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WorksheetsChemistry Regent - June 2013 Q31-40
Total questions: 10
Worksheet time: 11mins
Name
Class
Date
1.
Which element is not present in the mixture?
a)
A
b)
D
c)
X
d)
Z
2.
What is the overall charge of an ion that has 12 protons, 10 electrons, and 14 neutrons?
a)
2-
b)
2+
c)
4-
d)
4+
3.
As the elements in Period 3 are considered in order of increasing atomic number, there is a general decrease in
a)
atomic mass
b)
atomic radius
c)
electronegativity
d)
first ionization energy
4.
Which electron configuration represents the electrons of a sulfur atom in an excited state?
a)
2-6-6
b)
2-7-7
c)
2- 8- 4
d)
2-8-6
5.
Given the word equation: sodium chlorate ? sodium chloride oxygen Which type of chemical reaction is represented by this equation?
a)
double replacement
b)
single replacement
c)
decomposition
d)
synthesis
6.
Which compound has the highest percent composition by mass of strontium?
a)
SrCl2
b)
SrI2
c)
SrO
d)
SrS
7.
Given the formula for hydrazine: How many pairs of electrons are shared between the two nitrogen atoms?
a)
1
b)
2
c)
3
d)
4
8.
Which formulas represent one ionic compound and one molecular compound?
a)
N2 and SO2
b)
Cl2 and H2S
c)
BaCl2 and N2O4
d)
NaOH and BaSO4
9.
Which Kelvin temperature is equal to 200. degrees C?
a)
-73K
b)
73 K
c)
200. K
d)
473 K
10.
A 10.0-gram sample of H2O(l) at 23.0 degrees C absorbs 209 joules of heat. What is the final temperature of the H2O(l) sample?
a)
5.0 degrees C
b)
18.0 degrees C
c)
28.0 degrees C
d)
50.0 degrees C
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