WorksheetsMolecules Quiz Review
Total questions: 28
Worksheet time: 14mins
Name
Class
Date
1.
Identify the formula as an element, compound, and/or molecule.
MgCl2
a)
Element
b)
Compound
c)
Molecule
2.
Identify the formula as an element, compound, and/or molecule.
H2O
a)
Element
b)
Compound
c)
Molecule
3.
Identify the formula as an element, compound, and/or molecule.
O3
a)
Element
b)
Compound
c)
Molecule
4.
Identify the formula as an element, compound, and/or molecule.
Fe
a)
Element
b)
Compound
c)
Molecule
5.
Identify the formula as an element, compound, and/or molecule.
3NaCl
a)
Element
b)
Compound
c)
Molecule
6.
Identify the formula as an element, compound, and/or molecule.
Cl2
a)
Element
b)
Compound
c)
Molecule
7.
Which statement is true?
a)
All atoms are composed of molecules, but not all molecules are composed of atoms.
b)
All compounds are molecules, but not all molecules are compounds.
c)
All molecules are compounds, but not all compounds are molecules.
8.
A chemical formula is like a recipe for a chemical substance. What is true about a chemical formula?
a)
It is a picture of atoms bonded together to form molecules.
b)
It identifies which elements are in the chemical substance using chemical symbols.
c)
It identifies all of the different components in mixtures, like peanuts and M&Ms.
9.
What is an example of a chemical formula?
a)
Trail Mix
b)
Air
c)
NH4
d)
Option 4
10.
Explain what happens to the elements’ chemical properties when a compound forms.
a)
The chemical properties change to something new.
b)
The chemical properties stay the same.
c)
The chemical properties explode into a burst of flame.
11.
Which 2 choices are examples of what can happen to elements’ chemical properties when a compound forms?
a)
Two gases chemically bonded can form into a liquid like H2O.
b)
M&M's, peanuts, and raisins put in a bag form trail mix.
c)
Sodium is an explosive solid. Chlorine is a poisonous gas. Combined they make a solid, called salt.
d)
Salt molecules mixed with water molecules make salt water.
12.
Chemical compounds are different from mixtures because...
a)
a compound is a pure substance
b)
a mixture is a pure substance
c)
the ingredients of a chemical compound retain their properties
13.
In a chemical formula, what tells the number of atoms of each element that is present in the compound?
a)
the yield
b)
the coefficient
c)
the subscript
14.
In a chemical formula, what tells the number of molecules participating in the reaction?
a)
the yield
b)
the coefficient
c)
the subscript
15.
Bonds between atoms in a molecule form as a result of
a)
the deletion of electrons in the molecules
b)
the addition of protons in the atoms
c)
the sharing or exchanging of valence electrons
16.
Which model represents the chemical formula H2O2?
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
17.
What is the properly written chemical formula for this model?
a)
H2O
b)
2HO
c)
O2H
18.
What is the properly written chemical formula for this model?
a)
H3N
b)
3HN
c)
HN3
d)
4NH
19.
What is the properly written chemical formula for this model?
a)
C2O4
b)
2C2O2
c)
2CO2
20.
What is the properly written chemical formula for this model?
a)
CH4
b)
C4H
c)
4HC
21.
The basic building blocks of all matter is an _________________
a)
Atom
b)
Molecule
c)
Compound
d)
Element
22.
An ___________________ is a substance consisting of one or more atoms of the same type. It is on the periodic table.
a)
Molecule
b)
Compound
c)
Element
d)
Mixture
23.
A ___________________ are made of two or more atoms bonded together. The atoms can be the same or different.
a)
Molecule
b)
Compound
c)
Element
d)
Mixture
24.
A __________________ is a chemical substance formed when two or more different elements bond in a specific proportion.
a)
Atom
b)
Molecule
c)
Compound
d)
Mixture
25.
A ________________________ is not a pure substance. It is not chemically combined or change properties.
a)
Atom
b)
Molecule
c)
Compound
d)
Mixture
26.
How many Nitrogen molecules are present in the chemical formula?
a)
1
b)
2
c)
3
27.
How many Oxygen molecules are present in the chemical formula?
a)
1
b)
2
c)
3
28.
How many TOTAL atoms are present in the element Sodium (Na)?
a)
1
b)
2
c)
3
100 %
