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