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AP Chemistry Review

Total questions: 23

Worksheet time: 39mins

Name
Class
Date
1.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

2.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
3.
Value representing the number of protons in an element
a)
Atomic Mass
b)
Mass Number
c)
Valence Electrons
d)
Atomic Number
4.
Measure mainly of the nuclear particles: protons + neutrons
a)
Subatomic Particles
b)
Atomic Number
c)
Atomic Mass
d)
Gluons
5.
A charged atom
a)
Ion
b)
Isotope
c)
Electron Cloud
d)
Quark
6.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
7.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
8.

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

9.

How many different isotopes are shown in this mass spectrum?

a)

1

b)

84

c)

86

d)

4

10.

How many different isotopes of this element are shown in the mass spectrum?

a)

98

b)

7

c)

100

d)

95.9 g/mol

11.
Based on the mass spectrum, which isotope of chlorine is most abundant?
a)
35Cl
b)
37Cl
c)
70Cl
d)
72Cl
12.
The average atomic mass rhenium, Re, is 186.21 amu. If 37.1% of rhenium has mass# = 185, what is the other stable isotope?
a)
Rhenium-183
b)
Rhenium-181
c)
Rhenium-187
d)
Rhenium-189
13.
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
a)
NO
b)
N2O3
c)
N2O4
d)
N2O5
14.

A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula?

a)

CaCl2

b)

Ca2Cl4

c)

Ca2Cl2

d)

Ca4Cl2

15.

How many molecules are in 2.5 mol of NaCl?

a)

1.5 x 1024 molecules

b)

1.5 molecules

c)

4.15 molecules

d)

1.5 x 1023 molecules

16.

Calculate the number of atoms in 0.0340 g Zn.

a)

5.20 x 10-4 atoms Zn

b)

3.13 x 1023 atoms Zn

c)

3.13 x 1020 atoms Zn

d)

1.00 atom Zn

17.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
18.
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
a)
C2H5
b)
C4H10
c)
C1H2.5
d)
C4H8
19.

What would be the mass of 1.5mol H2O

a)

20.g

b)

27 g

c)

32 g

d)

40.g

20.

How many particles would be in 8.4 moles of Octane (C8H18)?

a)

5.77 x 1023

b)

5.06 x 1024

c)

5.77 x 1026

d)

5.06 x 1023

21.
How many moles are in 16.94g of water?
a)
16.94 mol H2O
b)
0.9401 mol H2O
c)
305.3 mol H2O
d)
1.063 mol H2O
22.
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.
a)
204
b)
206
c)
207
d)
208
23.
What is the average atomic mass for this element?
a)
10 amu
b)
10.8 amu
c)
19.9 amu
d)
11 amu

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