Chemistry ch. 2 test 9/11/17

Solid

- definite shape and volume - particles are tightly packed

Gas

-particles are far from each other -no definite volume -no definite shape

Liquid

-particles slide past each other -definite volume -no definite shape

Letters

... are used for chemical symbols today

Vapor

the gaseous state of a substance that is generally a liquid or a solid and room temperature (water ...)

Element

the simplest form of matter that has a unique set of properties: cannot be broken down into simpler substances by chemical means

Phase

used to describe any part of a sample with uniform composition and properties

Mass

The amount of matter in a given object

Volume

The amount of space occupied by an object

How elements are joined in the compound

The chemical formula of a compound does not indicated...

Corroding iron

What action changes the identity of the substance referred

Mixtures can be separated physically, while compounds cannot

What distinguishes a substance from a mixture

Elements and compounds

What do chemical symbols and formulas represent respectively

Fracture formation

What does not indicate that a chemical change may have taken place

Matter is neither destroyed or created

What happens to matter durning a chemical reaction

Its ability to decompose into hydrogen and oxygen

What is a chemical property of water at 4 degrees C

C. Evaporation

What is an example of a physical change A. Corrosion B. Explosion C. Evaporation D. Rotting of food

A compound can only be separated into its components by chemical means `

What is the difference between a mixture and a compund

The total mass of the reactants equals the total mass of the reactants

What is true for all chemical reactions

Check the composition of the sample before and after the change

What must be done to be certain that a chemical change has taken place

There must be a change in chemical properties

What must occur for a change to be chemical reaction

Chemical

When cooking and the food darkens, what change has happened

A chemical change

When paper turns yellow- brown upon exposure to sunlight, what type of change is likely taking place

D. All of the above

Which of the following are considered physical properties of a substance A. Color and odor B. Melting point and boiling point C. Malleability and hardness D. All of the above

B. Air

Which of the following cannot be classified as a substance A. Table salt B. Air C. Nitrogen D. Gold

A. Color

Which of the following is a chemical property A. Color B. Hardness C. Freezing point D. Ability to react with oxygen

D. Soil

Which of the following is a heterogeneous mixture A. Air B. Salt water C. Steel D. Soil

C. It is composed of hydrogen and oxygen

Which of the following is not a physical property of water A. It has a boiling point of 100 degrees C B. It is a colorless liquid C. It is composed of hydrogen and oxygen D. Sugar dissolves in it

B. Heat

Which of the following is not an example of matter A. Air B. Heat C. Smoke D. Water vapor

D. Silver

Which of the following material is a sub A. Air B. Gas C. Stainless steel D. Silver

C. Oil and vinegar

Which one is a heterogeneous mixture A. Vinegar in water B. Milk C. Oil and vinegar D. Air

Gas

Which state of matter expands when heated and is easy is compres

Liquid

Which state of matter has a definite volume and takes the shape of its container

Solid

Which state of matter is characterized by having a definite shape and definite volume

Liquid

Which state of matter is characterized by having an indefinite shape but definite volume

Gas

Which state of matter takes up both the shape and volume of its container

Potassium- K

Which substance has a chemical symbol that is diverted from its Latin name

chemical reaction

a change in which one or more reactants change into one or more products; characterized by the breaking of bonds in reactants and the formation of bonds in products

Mixture

a physical blend of two or more components

Compound

a substance that contains 2 or more elements chemically combined in a fixed proportion

Heterogeneous mixture

mixture that the composition is not uniform throughout

B. Salad dressing

Not a compound? A. Baking soda B. Salad dressing C. Sucrose D. Table salt

Contains more matter

A golf ball has more mass than a tennis ball because ___

Element and compound

A substance is 2 things:

Reactant

A substance present at the start of a reaction

Product

A substance produced in a chemical reaction

Liquid or solid

A substance that forms a vapor is generally at what physical state at room temperature

Gas

A vapor is which state of matter

A. Indefinite volume

All of the flowing are physical properties of a substance in the liquid state except A. Indefinite volume B. Definite mass C. Not easily compressed D. Indefinite shape

D. Ability to rust

All of the following are physical properties of matter except... A. Mass B. Color C. Melting point D. Ability to rust

Mass

An example of an extensive property of matter is ___

Matter

Anything that has mass and volume

Substances

Compounds are ...

Stainless steel

Ex of homogeneous mixture

Solutions

Homogeneous mixtures are also known as

Sucrose

In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, what is the reactant

Know where the metals, nonmetals, and metalloids are on the periodic table

Know where the metals, nonmetals, and metalloids are on the periodic table

Substance and mixture

Matter is 2 things:

Capitalized

The first figure in a property written chemical symbol is always ...

Homogeneous and heterogeneous

There are 2 kinds of mixtures:

Substance

matter that has a uniform and definite composition

homogeneous mixture

mixture that that the composition is uniform throughout