wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

AP Chemistry - Unit 1 Review

Total questions: 56

Worksheet time: 1hrs 24mins

Name
Class
Date
1.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
2.
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
3.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
4.
How many moles are in 19.82 g Mg? 
a)
1.226mol Mg
b)
481.7mol Mg
c)
1.000mol Mg
d)
 0.8156 mol Mg
5.

What is the mass in grams of 2.3456 moles of W?

a)

431.22 grams

b)

6.02 grams

c)

207.2 grams

d)

486.01 grams

6.

What is the molar mass of one mole of HCl?

a)

79.92 grams per mole of HCl

b)

36.46 grams per mole of HCl

c)

35.45 grams per mole of HCl

d)

1.01 grams per mole of HCl

7.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
8.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2 
d)
MgN
9.

2.40 g of an explosive, J, contains 0.473 g of nitrogen. J also contains 33.8% carbon and 1.41% hydrogen by mass. The remainder of J is oxygen.


What is the empirical formula of J?

a)

C4HNO2

b)

CH2N2O

c)

C2HNO2

d)

CHNO

10.
What is the empirical formula if you have 88.80% copper and 11.20% oxygen?
a)
Cu3O8
b)
CuO4
c)
Cu2O
d)
Cu4O10
11.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
12.
EF = CF2 
Molecular formula mass = 192
MF =
a)
C4F8
b)
C4F
c)
CF8
d)
C2F4
13.

What is the charge of a proton?

a)

Negative

b)

Positive

c)

Neutral

14.

What is the center of an atom containing protons and neutrons?

a)

nucleus

b)

neutron

c)

proton

d)

electron cloud

15.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
16.

What is the mass number?

a)

the number of protons in the nucleus

b)

the number of protons and neutrons in the nucleus

c)

the number of neutrons in the nucleus

d)

the number of protons and electrons in the atom

17.

What is the atomic number?

a)

the number of protons in the nucleus

b)

the number of protons and neutrons in the nucleus

c)

the number of neutrons in the nucleus

d)

the number of protons in the energy levels

18.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

19.

How many electrons are found in a neutral atom of chlorine ?

a)

35

b)

11

c)

18

d)

17

20.

Sodium has an atomic number of 11. How many protons does each sodium atom have?

a)

33

b)

22

c)

11

d)

0

21.

Which of these statements is INCORRECT?

a)

The number of protons determines the atomic number.

b)

The atomic number and number of protons are the same.

c)

An atomic number of 5 means there are 5 protons.

d)

The number of neutrons is always the same as the number of protons.

22.

An element has 5 protons, 6 neutrons, and 7 electrons. What is the charge of the atom?

a)

+2

b)

-1

c)

+1

d)

-2

23.
How many protons are in Cadmium?
a)
112.411
b)
170
c)
64
d)
48
24.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
25.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

26.

How many neutrons does C-14 contain? (tap to enlarge the image)

a)

6

b)

7

c)

14

d)

8

27.
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
28.
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
29.
Calculate the average atomic mass of silver.
a)
106.38649amu
b)
111.91896amu
c)
107.8677amu
d)
121
30.
An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?
a)
9.012, Beryllium
b)
12.011, Carbon
c)
6.941, Lithium
d)
10.812, Boron
31.
a)
12
b)
7
c)
8
d)
14
32.
a)
2
b)
8
c)
3
d)
13
33.

Which element has the electron configuration 1s22s22p63s23p5?

a)

chlorine

b)

fluorine

c)

sulfur

d)

phosphorus

34.

What is the electron configuration for this PES graph?

a)

1s22s22p63s23p2

b)

1s22s22p63s23p1

c)

1s22s22p63s23p3

d)

1s22s22p63s2

35.

Which element is represented by this PES graph?

a)

aluminum

b)

phosphorus

c)

sulfur

d)

silicon

36.

Which element is represented by this PES graph?

a)

calcium

b)

potassium

c)

titanium

d)

scandium

37.

Which element is represented by this PES graph?

a)

argon

b)

potassium

c)

calcium

d)

scandium

38.

The photoelectron spectra above show the energy required to remove a 1s electron from a nitrogen atom and from an oxygen atom. Which of the following statements best accounts for the peak in the upper spectrum being to the right of the peak in the lower spectrum?

a)

Nitrogen atoms have a half-filled p subshell.

b)

There are more electron-electron repulsions in oxygen atoms than in nitrogen atoms.

c)

Electrons in the p subshell of oxygen atoms provide more shielding than electrons in the p sub shell of nitrogen atoms.

d)

Nitrogen atoms have a smaller nuclear charge than oxygen atoms.

39.

A sample containing atoms of C and F was analyze using x-ray photoelectron spectroscopy. The portion of the spectrum showing the 1s peaks for atoms of two elements is shown above. Which of the following correctly identifies the 1s peak for the fluorine atoms and provides an appropriate explanation?

a)

Peak X, because F has a smaller first ionization energy than C has.

b)

Peak X, because F has a greater nuclear charge than C has.

c)

Peak Y, because F is more electronegative than C is.

d)

Peak Y, because F has a smaller atomic radius than C has.

40.

Researchers from the planet Zorba have discovered an atom with the following electron structure (shown as a shell model). Sketch the photoelectron spectrum that the researchers analyzed to obtain this knowledge of atomic structure.

a)

1s32s12p63s3

b)

1s32s12p43s3

c)

1s22s22p63s23p1

d)

1s22s22p63s2

41.

The photoelectron spectra of the 1s electrons of two isoelectronic species, Ca2+ and Ar, are shown above. Which of the following correctly identifies the species associated with peak X and provides a valid justification?

a)

Ar, because it has completely filled energy levels.

b)

Ar, because its radius is smaller than the radius of Ca2+

c)

Ca2+, because its nuclear mass is greater than that of Ar

d)

Ca2+, because its nucleus has two more protons than the nucleus that Ar has

42.
Looking at atoms in the same valence energy level, what factor affects Coulombic attraction?
a)
number of protons
b)
distance from the nucleus
43.
As the Coulombic attraction increases the atomic radius: increases or decreases?
a)
increases
b)
decreases
44.
Which element has the smaller atomic radius: potassium (K) or bromine (Br)?
a)
potassium (K)
b)
bromine (Br)
45.
As the Coulombic attraction in an atom increases, the energy needed to remove an electron: increases or decreases?
a)
increases
b)
decreases
46.
Which element has the greatest ionization energy: Aluminum (Al)    or    Chlorine (Cl)?
a)
Aluminum (Al)
b)
Chlorine (Cl)
47.
Which element has the greatest electronegativity: Nitrogen (N) or Arsenic (As)?
a)
Nitrogen (N)
b)
Arsenic (As)
48.
The atom with the largest atomic radius in Group 18 is - 
a)
Ar
b)
He
c)
Kr
d)
Rn
49.
The atom with the largest atomic radius in Period 4 (row 4) is - 
a)
K
b)
Kr
c)
Fe
d)
Fe
50.
Francium (Fr) has the lowest ionization energy in Group 1 because - 
a)
it has the smallest number of valence electrons
b)
it has the greatest atomic mass
c)
it has the greatest number of protons, so it attracts its electrons the strongest
d)
its 1 valence electron is very far from the nucleus, so little energy is needed to remove it
51.
As you move across the periodic table atoms tend to get smaller because, ______________.
a)
the atoms have more mass.
b)
the atoms have less mass
c)
the atoms have more protons.
d)
the atoms have less electrons.
52.
Families all have similar 
a)
Names
b)
atomic numbers
c)
atomic masses
d)
properties
53.

Put these elements in order of INCREASING atomic radius.

Li, O, C, F

a)

O, C, F, Li

b)

F, O, C, Li

c)

Li, C, O, F

d)

C, F, Li, O

54.

Put these elements in order of DECREASING atomic radius.

Ca, Be, Ba, Sr

a)

Sr, Ba, Be, Ca

b)

Be, Ca, Sr, Ba

c)

Ba, Sr, Ca, Be

d)

Ca, Be, Ba, Sr

55.

Which elements do you think will have a low ionization energy and lose electrons more readily?

a)

elements that form anions (negative charge)

b)

Elements that form cations (positive charge)

c)

Transition metals

56.

What elements have the highest Electronegativity?

a)

Halogens (group 17)

b)

Alkali Metals (Group 1)

c)

Alkaline-earth Metals (group 2)

d)

Noble gases (group 18)

Similar Resources on Wayground

Sun-Earth-Moon System Unit Summative Spring, '24

55 questions

Sun-Earth-Moon System Unit Summative Spring, '24

quiz

Worksheet

•

9th - 12th Grade

Plate Tectonics

60 questions

Plate Tectonics

quiz

Worksheet

•

6th - 12th Grade

The Brain and Behaviour Topic Revision Quiz

52 questions

The Brain and Behaviour Topic Revision Quiz

quiz

Worksheet

•

11th Grade

Forensic Science Final Exam

55 questions

Forensic Science Final Exam

quiz

Worksheet

•

11th - 12th Grade

W.E.D. Class review

60 questions

W.E.D. Class review

quiz

Worksheet

•

9th - 12th Grade

Lab Equipment Review

52 questions

Lab Equipment Review

quiz

Worksheet

•

8th - 12th Grade

16. GAS (CLASS 10)

51 questions

16. GAS (CLASS 10)

quiz

Worksheet

•

10th Grade

Molecule Naming

60 questions

Molecule Naming

quiz

Worksheet

•

9th - 12th Grade