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WorksheetsUnit 1: The Structure of Matter
Total questions: 57
Worksheet time: 57mins
Which of these substances is a compound?
Carbon (C)
Chlorine (Cl)
Uranium (U)
Ammonia (NH3)
If you were to look at grains of table salt (sodium chloride, NaCl) with a magnifying glass, you would see that each grain is a little cube. Why are salt grains cubical?
All extended structure compounds form cubes.
Sodium and chlorine atoms both have cubical shapes.
In the extended structure of NaCl, atoms are arranged in a cubical pattern.
A molecule of NaCl contains eight atoms, each at one of the corners of a cube.
Sucrose is composed of carbon, oxygen, and hydrogen. Which statement best describes the properties of sucrose?
They are exactly like the properties of carbon (C).
They are exactly like the properties of oxygen (O).
They are exactly like the properties of hydrogen (H).
They are different from the properties of carbon, oxygen, and hydrogen.
A molecule of methanol is composed of carbon atoms connected to 3 hydrogen atoms and a hydroxide group. A hydroxide group is made up of an oxygen atom bonded to a hydrogen atom. How many different types of atoms make up one molecule of methanol?
3
4
5
6
The diagram represents a chemical reaction. Reactant A and reactant B react to form product C. What type of substance is product C?
an atom
a mixture
an element
a compound
Which statement describes an example of a chemical property of a metal statue?
It is a solid
It is shiny
It is silver
It can tarnish
Which of these is an example of a physical property?
the fact that iron rusts
the texture of a piece of chocolate
the effect of acid rain on automobiles
the fact that gasoline in a car engine combusts
Which of these is a chemical property of a sheet of paper?
The paper can be burned.
The paper can be crumpled.
The paper does not attract a magnet.
The paper does not conduct electricity.
Hydrogen gas (H) can be found in trace amounts in Earth's atmosphere. Which of these statements describes a physical property of hydrogen?
Hydrogen is found in acids.
Hydrogen gas is highly flammable.
Hydrogen reacts with oxygen to form water.
Hydrogen gas is less dense than oxygen gas.
Which properties describe all matter?
being able to be seen in nature
having energy and temperature
being able to be easily measured
having mass and taking up space
Which statement best describes physical properties?
Physical properties behave identically for all matter under the same conditions.
Physical properties can be observed without changing the identity of a substance.
Physical properties are observed by seeing how a substance reacts with other substances.
Physical properties cause atoms and molecules to change structure when substances are mixed.
Water in a beaker measures 250 milliliters. A rock is completely submerged in the water. The water level now reads 300 milliliters. What is the volume of the rock in cubic centimeters? Explain your answer.
50 mL
100 mL
250 mL
300 mL
Which of these is smallest?
cell
atom
matter
elements
How do atoms of copper differ from atoms of aluminum?
They are not pure substances.
They have different chemical properties.
They can be formed by physical changes.
They are made up of more than one particle.
Which substance is one that cannot be separated or broken down into simpler substances by chemical means?
table salt
gold wire
candle wax
water vapor
Think about a wooden chair and a ballon. What do these two objects always have in common?
Both are made of atoms.
Both have the same physical properties.
Both are made of the same kind of atom.
Both are made of the same number of atoms.
Which statement best describes atoms?
Atoms combine to make all the substances on Earth.
Atoms of all substances have the same chemical properties.
Atoms are easily destroyed when matter is cooled or heated.
Atoms come in different sizes, but most are visible using a simple hand lens.
Which of these is the smallest particle to retain the properties of an element?
an atom
a proton
a molecule
an electron
What makes physical properties different from chemical properties?
Physical properties relate to elements rather than compounds
Physical properties appear only after a chemical change occurs
Physical properties describe elements in the solid state rather than in the liquid or gas state
Physical properties can be observed without attempting to change the identity of the substance.
A water molecule is made up of one oxygen and two hydrogen atoms. Why is water considered a pure substance?
Each water molecule is identical
Water can be broken down by physical means
Water molecules are made up of different types of atoms
Water can be combined with other substances by physical means.
Each element has a unique name. How else can an element be represented?
by its mass
by its state of matter
by its chemical symbol
by an identification number
Which statement describes a chemical property of an object?
The object is white in color.
The object has a powdery texture.
The object’s density is 2.11 g/cm3.
The object reacts with acid to form water.
Models of different combinations of elements are shown. Which image is a molecule?
Only the second image, water, is a molecule.
Only the first image, oxygen gas, is a molecule.
Only the third image, amino acid glycine, is a molecule.
All three images, oxygen, water, and amino acid glycine, are molecules.
Which statement describes a chemical property?
A particular substance evaporates at 30 °C.
A 2 ft. long metal bar has a mass of only 176 g
A certain heavy metal turns to a liquid at room temperature.
A metal is added to a beaker of water, and the beaker explodes.
All of these statements about elements, atoms, and compounds are true except _____.
compounds are smaller than atoms
atoms cannot be broken down into smaller substances
elements and compounds form the basis of all materials on Earth
elements consist of one type of atom and can combine to form compounds
Which of the following describes objects that are formed of molecules very close together with little room to move or are made up of molecules with repeating crystalline patterns?
colloid
gas
liquid
solid
Which of these is a way in which elements and compounds are similar?
Elements and compounds are both pure substances.
Elements and compounds are both listed on the periodic table.
Elements and compounds are both made up of different kinds of atoms.
Elements and compounds can both be broken down by physical changes.
Which type of substance is always made up of two or more different types of atoms joined by chemical bonds?
mixture
element
compound
pure substance
Diamond is a covalently bonded network solid that is made up of carbon atoms arranged in a way that gives diamonds their hardness. Which of these characteristics do diamonds share with all network solids?
low melting point
rarity and high cost
orderly crystal structure
made up of carbon atoms
Every compound is a molecule but not every molecule is a compound.
Which item on this element square is the chemical symbol?
Copper
29
Cu
63.546
What is the atomic mass?
Cu
29
Copper
63.546
What is the atomic number?
Cu
29
Copper
63.546
Which of the following is an element?
CO2
NH3
Al
H2O
