WorksheetsChemistry Test Review
Total questions: 85
Worksheet time: 43mins
Name
Class
Date
1.
Which of the following best describes a neutron?
a)
It has no charge and about the same mass as a proton
b)
It has a negative charge and much less mass than a proton
c)
It has a positive charge and much more mass than a neutron
d)
It has a negative charge and about the same mass as a neutron
2.
What type of particles are found in the cloud surrounding an atom's nucleus?
a)
positively charged particles and negatively charged particles
b)
negatively charged particles only
c)
neutral particles and positively charged particles
d)
positively charged particles only
3.
What is the mass number of a sodium atom that has 12 neutrons?
a)
11
b)
12
c)
22
d)
23
4.
An atom has 79 protons, 118 neutrons, and 79 electrons. What is the charge of the atom's nucleus?
a)
+79
b)
+118
c)
0
d)
-5
5.
An atom has 38 protons, 50 neutrons, and 36 electrons. What is the atom's charge?
a)
+2
b)
-2
c)
0
d)
+12
6.
An atom of a certain element has 50 protons, 50 electrons, and a mass number of 119. At room temperature, this element is a solid. How many neutrons are in this atom?
a)
50
b)
100
c)
119
d)
69
7.
An atom's electrical charge is neutral because...
a)
the atom has more neutrons than protons or electrons
b)
the negative charge of the neutrons cancel out the positive charge of the protons
c)
the electron's mass is much smaller than the mass of the protons or neutrons
d)
the atom has the same number of protons and electrons
8.
Which of these best describes one of the subatomic particles that could be found at location X?
a)
it has no mass and a positive charge
b)
it has a large mass and a negative charge
c)
it has a large mass and a positive charge
d)
it has no mass and a neutral charge
9.
Identify the atom.
a)
Carbon
b)
Nitrogen
c)
Silicon
d)
Phosphorus
10.
Identify the atom based on the number of neutrons.
a)
Beryllium
b)
Boron
c)
Lithium
d)
Carbon
11.
Identify the atom.
a)
Aluminum
b)
Magnesium
c)
Silicon
d)
Phosphorus
12.
Identify the atom.
a)
Fluorine
b)
Chlorine
c)
Neon
d)
Oxygen
13.
Identify the atom.
a)
Boron
b)
Gallium
c)
Lithium
d)
Aluminum
14.
Calcium has an atomic number of 20. Calcium's atomic number tells you that the element's atom always has...
a)
20 electrons
b)
20 neutrons
c)
20 protons
d)
20 protons and neutrons
15.
What are valence electrons?
a)
the electrons in an atom's innermost energy level
b)
the electrons within an atom's nucleus
c)
the electrons that change to protons
d)
the electrons in an atom's outermost energy level
16.
Elements in Group 18 are known as Noble Gases. What makes these elements unlikely to react?
a)
the number and placement of the protons
b)
the number of isotopes of the atom
c)
the number of valence electrons
d)
the number of energy levels
17.
What element is represented in the model to the right if the atom has a charge of +2?
a)
Beryllium
b)
Boron
c)
Helium
d)
Lithium
18.
A student studying magnesium, a highly reactive element that is essential to cells of all living organisms. Which characteristic of magnesium is most closely related to its chemical reactivity?
a)
the 12 protons in each atom of magnesium
b)
the density of magnesium, which is 1.74 g/cm3
c)
the atomic mass of magnesium, which is 24.305 amu
d)
the two valence electrons in each atom of magnesium
19.
The table lists three characteristics of an atom of an element. Which element is described by the data in the table?
a)
Radon (Rn)
b)
Cadmium (Cd)
c)
Rubidium (Rb)
d)
Astatine (At)
20.
When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?
a)
total number of neutrons
b)
total number of protons
c)
total number of subatomic particles
d)
number of valence electrons
21.
What characteristic of an element’s atoms always determines the element’s identity?
a)
number of protons
b)
number of neutrons
c)
number of valence electrons
d)
number of energy levels
22.
A model of a neutral atom is shown. An atom of which element is represented by this model?
a)
Boron (B)
b)
Carbon (C)
c)
Neon (Ne)
d)
Sodium (Na)
23.
The atoms of a certain element each contain 17 protons and 7 valence electrons. Which statement correctly identifies the element and describes its chemical reactivity?
a)
The element is chlorine, and it is highly reactive
b)
The element is manganese, and it is not very reactive
c)
The element is chlorine, and it is not very reactive
d)
The element is manganese, and it is highly reactive
24.
Why is potassium more likely to react with another element than an element such as argon?
a)
potassium has one more proton than argon
b)
potassium has two fewer neutrons than argon
c)
potassium has one more electron than argon
d)
potassium has one more energy level than argon
25.
How are the elements arranged on the periodic table?
a)
alphabetical order
b)
increasing order of atomic number
c)
decreasing order of the number of valence electrons
d)
increasing order of the number of neutrons
26.
What are the vertical columns of the periodic table called, and how many columns are there?
a)
there are seven columns, called periods
b)
there are seven columns, called groups
c)
there are eighteen columns, called periods
d)
there are eighteen columns, called groups
27.
Indicate the number in the periodic table that would be the approximate location of an element that is a pale-yellow, brittle solid and does not conduct electricity.
a)
1
b)
2
c)
3
d)
4
28.
Indicate the number in the periodic table that would be the approximate location of an element that is shiny and silvery in appearance, extremely malleable and ductile, able to conduct heat and electricity extremely well, and is highly reactive.
a)
1
b)
2
c)
3
d)
4
29.
Indicate the number in the periodic table that would be the approximate location of an element that is colorless, odorless, and inert.
a)
1
b)
2
c)
3
d)
4
30.
A researcher wants to experiment with an element that reacts like sulfur (S) but has a greater atomic mass. Which element should the researcher select for the experiment?
a)
oxygen
b)
chlorine
c)
selenium
d)
phosphorus
31.
Which two elements on the periodic table are in the same group?
a)
Sr and Ag
b)
Mg and Ca
c)
B and S
d)
Ga and Ge
32.
What is a group of elements in the periodic table?
a)
a row of elements that have the same atomic number
b)
a row of elements that have the same number of valence electrons
c)
a column of elements that have similar chemical properties
d)
a column of elements that were discovered by the same scientists
33.
What is true about P, Q, R, and S?
a)
they are all gases
b)
they are all in the same group
c)
they all have the same number of energy levels
d)
they are all metalloids
34.
What is true about V, W, X, Y, and Z?
a)
they are in the same period
b)
they are in the same group
c)
they are all nonmetals
d)
they are all gases
35.
Which atom is inert?
a)
atom 1
b)
atom 2
c)
atom 3
d)
atom 4
36.
What period are atoms 1 and 2 in?
a)
Period 1
b)
Period 2
c)
Period 3
d)
Period 4
37.
Which two atoms are in the same group or family?
a)
atom 1 and atom 4
b)
atom 1 and atom 2
c)
atom 2 and atom 3
d)
atom 3 and atom 4
38.
What group or family is atom 2 in?
a)
Group 3
b)
Group 13 (3A)
c)
Group 2
d)
Group 10
39.
The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below. Which of these elements is in this group?
a)
Lithium
b)
Strontium
c)
Aluminum
d)
Silicon
40.
The chemical formula for Tylenol is C8H9NO2. How many nitrogen atoms are in the formula for Tylenol?
a)
1
b)
2
c)
8
d)
9
41.
The chemical formula for Windex is NH3. What elements, and how many atoms of each, bond to form Windex?
a)
one atom of sodium and three atoms of helium
b)
three atoms of nitrogen and one atom of hydrogen
c)
one atom of nitrogen and three atoms of hydrogen
d)
one atom of nickel and three atoms of mercury
42.
Sam added baking soda to acetic acid and placed it in a flask. He stretched a balloon over the opening of the flask. After several minutes, he noticed small bubbles rising along the side of the flask as the balloon slowly began to inflate. Drew concluded that –
a)
a physical change was occurring
b)
the bubbles indicated a chemical change
c)
the baking soda and acetic acid were products of a chemical reaction
d)
the strong smell was evidence of a physical change
43.
Which information could a student determine from only the chemical formula of a protein?
a)
the color of the protein
b)
the number of molecules in each sequence that makes up a protein
c)
the physical arrangement of atoms in the structure of the protein
d)
the number of atoms of each element in the protein
44.
The chemical equation for photosynthesis is shown. How many atoms are represented in the products of this equation?
a)
36 atoms
b)
30 atoms
c)
26 atoms
d)
3 atoms
45.
Ethylene glycol is the compound commonly referred to as antifreeze. The chemical formula for antifreeze shows two atoms of carbon, six atoms of hydrogen, and two atoms of oxygen. What is the chemical formula for antifreeze?
a)
2C + 6H + 2O
b)
C2+ H6+ O2
c)
C2H6O2
d)
C2H6O2
46.
Which of the following is a true statement about chemical equations?
a)
an element or compound must be accompanied by a phase change
b)
the coefficients tell you the number of molecules of each reactant used and the number of molecules of each product made
c)
you can change the number of atoms in each molecule
d)
you end up with a different number of atoms of an element on the reactant side for the same element on the product side
47.
Aspartame is an artificial sweetener used as a sugar substitute in some foods and beverages. The formula for aspartame is C14H18NO5. How many total atoms are in a molecule of aspartame?
a)
37 atoms
b)
38 atoms
c)
4 atoms
d)
32 atoms
48.
How many atoms of oxygen are in two molecules Vitamin C: C6H8O6?
a)
6
b)
8
c)
20
d)
12
49.
A student mixes two solutions, planning to produce a chemical reaction. Which of the following is NOT evidence that a chemical reaction is happening?
a)
color change
b)
odor change
c)
temperature change
d)
size change
50.
A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3) onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?
a)
The baking soda and hydrochloric acid combined and bubbles formed
b)
the baking soda absorbed the hydrochloric acid
c)
some of the baking soda dissolved in the hydrochloric acid
d)
the hydrochloric acid evaporated, leaving only baking soda
51.
A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction?
a)
heat is added to the sugar crystals
b)
the sugar melts and becomes a liquid
c)
the temperature of the sugar increases
d)
gas is produced as the sugar turns black
52.
During an investigation, a student combined the two clear, colorless solutions below. The student observed that the temperature changed from 25oC to 23oC when the solutions were combined and that a white substance rapidly formed and settled at the bottom of the container. What most likely happened to produce these results?
a)
one of the original compounds came out of the solution
b)
the solution reacted chemically
c)
some of the water froze into ice crystals
d)
rapid evaporation of water occurred, leaving a solid
53.
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?
a)
the shape of the coal changes
b)
oxygen is present
c)
a new substance is produced
d)
coal is made up of more than one element
54.
How many atoms of sulfur are in the reactants?
2S + 3O2--> 2SO3
2S + 3O2--> 2SO3
a)
6
b)
5
c)
2
d)
1
55.
Potassium (K) reacts with chlorine gas (Cl2) to yield potassium chloride (KCl). Which chemical equation describing the reaction is a balanced equation?
a)
K + Cl2--> KCl
b)
2K + Cl2--> 2KCl
c)
2K + 2Cl2--> 2KCl
d)
K + Cl2--> 2KCl
56.
Which of these is a balanced equation for photosynthesis?
a)
12CO2+ H2O -> C6H12O6+ O2
b)
CO2+ 9H2O -> C6H12O6+ O2
c)
CO2+ H2O -> 3C6H12O6+ O2
d)
6CO2+ 6H2O -> C6H12O6+ 6O2
57.
Is the chemical equation balanced?
2Cu + S --> Cu2S
2Cu + S --> Cu2S
a)
yes
b)
no
58.
Is the chemical equation balanced?
SO3+ 2H2O -> H2SO4
SO3+ 2H2O -> H2SO4
a)
yes
b)
no
59.
What coefficient should be placed in front of oxygen to balance the following equation?
2CH3OH + __O2 --> 2CO2 + 4H2O
2CH3OH + __O2 --> 2CO2 + 4H2O
a)
1
b)
2
c)
3
d)
4
60.
What coefficient should be placed in front of carbon dioxide to balance the following chemical equation?
2C2H2 + 5O2 --> ___CO2 + 2H2O
2C2H2 + 5O2 --> ___CO2 + 2H2O
a)
1
b)
2
c)
3
d)
4
61.
Neutral atoms have the same number of which two particles?
a)
neutrons and protons
b)
neutrons and electrons
c)
protons and electrons
d)
valence electrons and neutrons
62.
Which two subatomic particles have about the same mass?
a)
protons and neutrons
b)
neutrons and electrons
c)
electrons and protons
d)
they all have different masses
63.
How do you calculate the number of neutrons in an atom?
a)
in a neutral atom, the number of neutrons is the same as the number of protons
b)
atomic mass - atomic number
c)
the group number indicates the number of valence electrons
d)
the atomic mass is the number of neutrons
64.
What do we call columns on the periodic table?
a)
periods
b)
cousins
c)
groups
d)
sections
65.
What do we call rows on the periodic table?
a)
families
b)
groups
c)
levels
d)
periods
66.
What do elements in the same group have in common?
a)
they have the same number of valence electrons
b)
they have the same number of energy levels
c)
they have the same state of matter
d)
they were discovered by the same scientist
67.
What do elements in the same period have in common?
a)
they have the same number of valence electrons
b)
they have the same chemical properties
c)
they have the same number of energy levels
d)
they have the same atomic number
68.
Which elements have similar chemical properties?
a)
elements in the same group
b)
elements with the same number of valence electrons
c)
elements in the same family
d)
all of these
69.
Which group contains unreactive, inert gases?
a)
Noble gases
b)
Alkali Earth metals
c)
Alkaline metals
d)
Halogens
70.
Which group of metals is most reactive?
a)
metals in group 1
b)
transition metals
c)
metals in group 2
d)
metals in the lanthanide and actinide series
71.
Which group of nonmetals is most reactive?
a)
nonmetals in group 16
b)
nonmetals in group 17
c)
nonmetals in group 18
d)
all nonmetals are inert
72.
What elements are found in the shaded region?
a)
nonmetals
b)
metalloids
c)
metals
d)
inert elements
73.
What elements are found in the shaded region?
a)
metals
b)
nonmetals
c)
metalloids
d)
liquids
74.
What elements are found in the region shaded in red?
a)
metals
b)
nonmetals
c)
metalloids
d)
transition elements
75.
Which elements have properties of both metals and nonmetals?
a)
transition elements
b)
metalloids
c)
semiconductors
d)
halogens
76.
What element is this?
a)
Boron
b)
Beryllium
c)
Lithium
d)
Fluorine
77.
What element has four energy levels and one valence electron?
a)
potassium
b)
titanium
c)
carbon
d)
rubidium
78.
What element is indicated in the picture, if the atoms has a +1 charge?
a)
helium
b)
lithium
c)
beryllium
d)
boron
79.
What element has 7 valence electrons and 45 neutrons?
a)
bromine
b)
selenium
c)
manganese
d)
rhodium
80.
What elements has 3 valence electrons and 4 energy levels?
a)
indium
b)
gallium
c)
scandium
d)
silicon
81.
A neutral atom has 48 neutrons and 36 electrons. What element is this?
a)
magneiusm
b)
cadmium
c)
krypton
d)
bromine
82.
Identify the element.
a)
magnesium
b)
chromium
c)
aluminum
d)
sodium
83.
How many atoms of carbon are in the following compound?
COS
COS
a)
1
b)
3
c)
0
d)
2
84.
How many atoms of hydrogen are in the following compound?
C6H6BHO2
C6H6BHO2
a)
6
b)
7
c)
16
d)
14
85.
How many atoms of iodine (I) are in the following compound?
BiI4
a)
5
b)
4
c)
1
d)
0
100 %
