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WorksheetsChemistry Final Review #1
Total questions: 12
Worksheet time: 12mins
Name
Class
Date
1.
In a measurement, significant figure consist of the digits known ___________.
a)
only
b)
plus one estimated digit
c)
plus two estimated digits
2.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
3.
Which of the following is the answer for the problem with the correct number of significant digits?
23.91 x 12.861 = 307.50651
23.91 x 12.861 = 307.50651
a)
308
b)
307.51
c)
307.5
d)
307
4.
The correct chemical formula for magnesium phosphide is
a)
MgP
b)
Mg₂P₃
c)
Mg₃P₂
d)
Mg₃(PO₄)₂
5.
What is the formula for manganese(III) oxide?
a)
MgO
b)
Mg2O3
c)
MnO
d)
Mn2O3
6.
The formula of calcium phosphate is
a)
CaPO4
b)
Ca2(PO4)3
c)
Ca3PO4
d)
Ca3(PO4)2
7.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
8.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
9.
If X is the symbol for an element, which of the following two symbols represent isotopes of the same element? I. 7735X II. 7733X III. 8137X IV. 8135 X
a)
I and II
b)
III and IV
c)
I and IV
d)
I and III
10.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
11.
What is the maximum number of electrons that an orbital can have?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
12.
What atom matches this electron configuration?
[Xe] 6s2 4f14 5d9
[Xe] 6s2 4f14 5d9
a)
Mercury
b)
Gold
c)
Platinum
d)
Thallium
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