Elements, Compounds and Mixtures Test
A solevent is a substance in which a solute is dissolved True or False
True
A(n) mixture is made of two or more substances - elements, compounds, or both - that are together in the same place but are not chemically combined. True or False
True
In a(n) heterogeneous mixture, like a salad, you can see the different parts. True or False
True
Which of the following describes compounds a. are composed of elements that join in a specific ratio according to their masses b. are composed of two or more elements that are physically combined c. are random combinations of elements d. have the same characteristic properties as the elements that form them
a. are composed of elements that join in a specific ratio according to their masses
One example of a chemical change is a. burning wood b. filtering c. crushing a can d. boiling water
a. burning wood
Which of the following is NOT a compound? a. gold b. water c. salt d. ammonia
a. gold
Lemonade consists of several substances that are NOT chemically combined, so lemonade is classified as a(n) a. mixture b. compound d. elements d. pure substance
a. mixture
when elements form compounds, the elements a. react to form a new substance with new properties b. keep their original properties c. always change their physical state d. combine in a random fashion
a. react to form a new substance with new properties
A material is only a mixture if a. you can physically separate the different components b. you can see all the components c. it develops its own set of characteristic properties
a. you can physically separate the different components
Substances that CANNOT be broken down chemically into other substances are a. compounds b. elements c. solution d. mixtures
b. elements
which of the following describes a mixtures? a. can be separated only by chemical means b. made up of two or more substances that keep their identities c. formed from two or more substances chemically combined d. made up of two or more substances joined ina specific ratio
b. made up of two or more substances that keep their identities
Which of the follwing best describes chicken noodle soup? a. compound b. mixture c. elements d. solution
b. mixture
salt water is a(n) a. compound b. solution c. colloid d. suspension
b. solution
Temperature a liquid changes to a gas
boiling point
Which of the following does NOT describe elements? Maybe more than one answer a. They have unique sets of properties b. They can join together to form compounds c. All the particles are alike d. They can be broken down into simpler substances.
c. All the particles are alike d. They can be broken down into simpler substances.
A solution is a(n) a. Insoluble solute in a solvent b. Heterogeneous mixture c. Homogeneous mixture d. compound composed of two or more substances
c. Homogeneous mixture
which of the following is a compound a. nitrogen b. oxygen c. carbon dioxide d. hydrogen
c. carbon dioxide
One exsample of a physical change is a. heating table sugar b. burrning paper c. dissolving salt in water d. baking cookies
c. dissolving salt in water
Soil, a salad, and sugar water are all examples of a. compounds b. elements c. mixtures d. atoms
c. mixtures
what is often called the universal solvent a. air b. sodium c. water d. vinegar
c. water
How well a substance allows electricity or heat to flow through it
conductivity
Most elements a. react with water or oxygen b. easily undergo a chemical change c. are rarley found alone in nature d. All of the above
d. All of the above
Which of the following is a mixture? a. sodium chloride b. ammonia c. carbon dioxide d. air
d. air
Examples of solutions can be a. liquids b. gases c. solids d. all of the above
d. all of the above
characteristic properties of an element a. do not depend on the amount of the element b. include both physical and chemical properties c. can be used to help Identify the element d. all of the above
d. all of the above
Table sugar and table salt are examples a. elements b. atoms c. mixtures d. compounds
d. compounds
A solution that contains a large amount of solute is best described as a. dilute b. weak c. unsaturated d. concentrated
d. concentrated
H2O, CO2, and C12H22O11 are all examples of chemical a. changes b. properties c. charecteristics d. formulas
d. formulas
All elements are composed of extremely small particles called a. compounds b. elements c. pure substance d. mixture
d. mixture
Which of the following is NOT a physical property a. melting point b. density c. boilling point d. reactivity with acid
d. reactivity with acid
How well substance can be pulled into wires
ductility
how shiny a substance is
luster
How easily a substance can be pounded into new shapes
malleability
Temperature at which a solid turns into liquid
melting point
How well a substance dissolves in another
solubility
how rough or smooth an object is
texture
solid, liquid, gas
three states of matter
How is a mixture different from a compound? a. Each substance in a mixture keeps its characteristic properties b. solids liquids and gases can form mixtures c. Mixtures are commonly found in nature d. Mixtures have two or more components
Each substance in a mixture keeps its characteristic properties
An compound is a pure substance that cannot be separated into simpler substances by physical or chemical means True or False
False