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WorksheetsChemistry
Total questions: 80
Worksheet time: 1hrs 11mins
Name
Class
Date
1.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
2.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
3.
Element or compound?
H2O
H2O
a)
element
b)
compound
4.
Element or compound?
O2
O2
a)
Element
b)
Compound
5.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
6.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
7.
Which is the correct formula for:
one carbon (C)
two oxygen (O)
one carbon (C)
two oxygen (O)
a)
CO2
b)
CO
c)
C2O
d)
2CO
8.
How many elements are in H2O?
a)
1
b)
2
c)
3
d)
4
9.
Which of the following is NOT an element?
a)
H2O
b)
H2
c)
O2
d)
Au
10.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
11.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
12.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
13.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
14.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
15.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
16.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
17.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
18.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
19.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
20.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
21.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
22.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
23.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
24.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
25.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
26.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
27.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
28.
Which substance has a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
29.
Is this substance acidic, alkali, or neutral?
a)
Acidic
b)
alkali
c)
Neutral
30.
Is this substance acidic, alkali, or neutral?
a)
Acidic
b)
alkali
c)
Neutral
31.
A solution with a pH of 3.6 would be...
a)
Acid
b)
alkali
c)
Neutral
d)
Acid and alkali
32.
what color does blue litmus paper turn in a acid
a)
red
b)
blue
c)
green
d)
magenta
33.
Which of the following is a property of an acid?
a)
pH > 7
b)
turns litmus paper blue
c)
tart or sour taste
d)
corrosive to organic materials
34.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
35.
On the universal pH scale, which color is neutral?
a)
Blue
b)
Red
c)
Green
d)
Maroon
36.
A ___________ is an arrangement of elements in columns
a)
columns
b)
rows
c)
periodic table
d)
electron shell
37.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
46.
Each column in the periodic table is called a
a)
period
b)
group
c)
cluster
d)
unit
39.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
47.
Which group of the periodic table is composed of inert (not reactive) gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
41.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
42.
Which element is not a metal?
a)
H
b)
Re
c)
Al
d)
B
43.
The atoms along the staircase are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
44.
Which is an alkali metal?
a)
Magnesium
b)
Iron
c)
Sodium
d)
Europium
45.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
46.
Each column in the periodic table is called a
a)
period
b)
group
c)
cluster
d)
unit
47.
Which group of the periodic table is composed of inert (not reactive) gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
48.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
49.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
50.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
51.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
52.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
53.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
54.
The electrons of an atom are found...
a)
in the outer "cloud" surrounding the atom.
b)
in the nucleus of the atom.
c)
in the cloud and in the nucleus.
55.
The subatomic particle with a negative charge is the
a)
electron
b)
proton
c)
neutron
d)
nucleus
56.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
57.
What is the smallest unit of matter called
a)
elements
b)
atoms
c)
compounds
d)
cells
58.
What is the atomic mass of Neon?
a)
10
b)
20.18
c)
10.18
d)
20.18
59.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
60.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
62.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
62.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
63.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
64.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
65.
The majority of an atom's mass exists where?
a)
In the nucleus
b)
In the electron cloud
c)
In the space between the nucleus and the electrons
d)
In the neutrons
66.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
67.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
68.
The period for Bromine is ___________.
a)
3
b)
2
c)
4
69.
What is the name of the group that has the MOST reactive NONMETALS in it?
a)
Alkaline earth
b)
Alkali
c)
halogens
d)
noble gases
70.
What are electrons?
a)
Negatively charged particles
b)
Neutrally charged particles
c)
Positively charged particles
d)
Uncharged particles
71.
How many electrons are in the outer shell of Sodium (Na)?
a)
3
b)
1
c)
2
d)
4
75.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
73.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
74.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
75.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
76.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
77.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
78.
Predict the bond that will form between Se and Cl.
a)
Ionic
b)
Covalent
79.
A ________is the force of attraction between atoms sharing electrons.
a)
Synthetic Bond
b)
Ionic Bond
c)
Molecular Bond
d)
Covalent Bond
80.
What are ionic bonds?
a)
Valence electrons transferred between atoms
b)
Inner most electrons transferred between atoms
c)
Sharing electrons
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