WorksheetsAtoms, Molecules, Elements & Compounds Quiz Review
Total questions: 40
Worksheet time: 24mins
Name
Class
Date
1.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
2.
Which part of an atom is POSITIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
3.
What part of an atom is NEGATIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
4.
Which part of an atom has no charge?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
5.
What is the name of a single type of atom?
a)
cell
b)
proton
c)
element
d)
atom
6.
What is the term for combining 2 or more atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
7.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
8.
TRUE OR FALSE:
Every compound is a molecule but not every molecule is a compound.
Every compound is a molecule but not every molecule is a compound.
a)
TRUE
b)
FALSE
9.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
10.
What is the picture displayed?
a)
atom
b)
element
c)
molecule
d)
compound
11.
Are these molecules also compounds?
a)
YES
b)
NO
12.
Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?
a)
Hydrogen is an element made of two or more kinds of atoms.
b)
Hydrogen is a compound made of only one kind of atom.
c)
Hydrogen is a compound made of two or more kinds of atoms.
d)
Hydrogen is an element made of only one kind of atom.
13.
The element oxygen, represented by the symbol O, is classified as
a)
a pure substance
b)
a compound
c)
a mixture
d)
a solution
14.
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
a)
methane is an element and carbon and hydrogen are compounds.
b)
carbon, hydrogen, and methane are all elements.
c)
carbon, hydrogen, and methane are all compounds.
d)
carbon and hydrogen are elements and methane is a compound.
15.
What is a compound?
a)
an atom with more electrons than protons
b)
a substance in which the atoms of two or more elements are combined together
c)
an atom with more neutrons than protons
d)
a substance in which the atoms of three or more elements are combined together
16.
The chemical combination of two or more different kinds of atoms in fixed amounts is called a(n)
a)
orbit
b)
compound
c)
mixture
d)
element
17.
Atoms combine to form _______.
a)
electrons
b)
molecules
c)
nuclei
d)
neutrons
18.
Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?
a)
atom
b)
mixture
c)
element
d)
compound
19.
What are the basic building blocks for all matter?
a)
atoms
b)
elements
c)
compounds
d)
chemicals
20.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
21.
All ____________ are made up of two or more atoms bonded together.
a)
atoms
b)
molecules
c)
electrons
d)
elements
22.
When __________ form, the elements lose there individual chemical properties and take on new properties.
a)
compounds
b)
atoms
c)
subscript
d)
formula
23.
A recipe for a chemical substance is called a ________ _________.
a)
coefficent
b)
chemical formula
c)
Oxygen
d)
atom
24.
H2O2← ?
This number tells the number of atoms present.
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
25.
2H2O
How many H2O molecules are present?
How many H2O molecules are present?
a)
1
b)
4
c)
2
d)
8
26.
H2O
How many Oxygen atoms are present?
a)
2
b)
4
c)
1
d)
5
27.
H2O
How many Hydrogen atoms are present?
a)
2
b)
4
c)
1
d)
10
28.
What is a molecule?
a)
two elements bonded together (sharing electrons)
b)
a mixture of different substances
c)
smallest individual particles
d)
salt mixed in water
29.
What is the chemical symbol of the element Hydrogen?
a)
Hy
b)
H
c)
Hydro
d)
Hg
30.
What is the chemical symbol for the element Carbon?
a)
C
b)
Ca
c)
Carb
d)
CO
31.
Why is it impossible to see molecules with the naked eye?
a)
they are too big
b)
they are too small
c)
they are too fast
d)
they have no mass
32.
Which of these compounds has the most atoms?
a)
CO2
b)
C6H12O6
c)
O2
d)
NaClHeO3
33.
A water molecule contains
a)
one hydrogen atom and two oxygen atoms
b)
two hydrogen atoms and one oxygen atom
c)
two hydrogen atoms and two oxygen atoms
d)
two hydrogen atoms and no oxygen atoms
34.
A molecule of H2SO4 contains how many atoms?
a)
3
b)
6
c)
7
d)
8
35.
What is the common name for H2O?
a)
salt
b)
acid
c)
base
d)
water
36.
What is the difference between elements and compounds?
a)
elements have more than one kind of atom while compounds have only one kind of atom
b)
elements can separate by physical means while compounds cannot
c)
compounds have more than one kind of atom while elements have only one kind of atom
d)
elements are acids while compounds are bases
37.
What is the chemical name for CO2?
a)
carbon trioxide
b)
carbon monoxide
c)
carbon dioxide
d)
methane
38.
What is the common name for NaCl?
a)
salt
b)
acid
c)
base
d)
water
39.
Which of the following IS a molecule but is NOT a compound?
a)
CO2
b)
C
c)
O2
d)
CO
40.
This diagram represents...
a)
An element
b)
A molecule
c)
A compound
d)
A mixture of elements and compounds
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