Unit 1 Matter “If we all did the things we are capable of doing, we would literally astound...

Unit 1 Matter

“If we all did the things we are capable of doing, we would literally astound ourselves.”

Thomas A. Edison

Matter:

• Has mass

• Takes up space

What types of matter are there?

Does it matter?

A grocery store is organized

How is matter organized?

Start like this

How is matter organized?

Phases of matter

• Solid• Liquid• Gas

Phases of matter

• Solid• Liquid• Gas

…best defined on substances—mixtures are harder to classify.

Phases of matter

Volume Shape

Solid Definite Definite

Liquid Definite Indefinite

Gas Indefinite Indefinite

Phases of matter

Volume Shape

Solid Definite Definite

Liquid Definite Indefinite

Gas Indefinite IndefiniteDepends on te

Properties

• You can describe a sample of matter by describing its properties.

• Chemical properties describe the types of chemical reactions it can undergo.

• Physical properties are all other properties.

Types of Matter

• All matter is either a substance or a mixture of substances

Types of Matter

• All matter is either a substance or a mixture of substances

• A mixture can be separated using physical changes. No new substances are formed

• A substance cannot be separated by physical means

Types of Matter

All matter is either a substance or a mixture of substances

• A substance is either an element or a compound.

Types of Matter

• A substance is either an element or a compound.

• An element is composed of identical atoms

• A compound is composed of atoms of different elements chemically bonded

Types of Matter

A substance is either an element or a compound.

• An element can be a metal or a nonmetal

Types of Matter

• An element can be a metal or a nonmetal

• Metals are on the left of the periodic chart

• Nonmetals are on the right

Types of Matter

An element can be a metal or a nonmetal

• A compound is either ionic or covalent

Types of Matter

• A compound is either ionic or covalent• An ionic compound has a metal and a

nonmetal — an ionic bond is formed by the transfer of electrons

• A covalent compound has nonmetal atoms only —covalent bonds are the sharing of electrons

Types of Matter

A compound is either ionic or covalent

• A mixture is either homogeneous or heterogeneous

Types of Matter

• A mixture is either homogeneous or heterogeneous

• A homogeneous mixture is called a solution—has the same composition throughout

• A heterogeneous mixture has chunks.

Types of Matter

A mixture is either homogeneous or heterogeneous

Matter

Substance

Mixture

Matter

Substance

Mixture

CompoundElement

Matter

Substance

Mixture

CompoundElement

Metal Nonmetal

Matter

Substance

Mixture

CompoundElement

Metal Nonmetal Ionic

Molecular

Matter

Substance

Mixture

CompoundElement

Heterogeneous

Homogeneous

Molecular

Matter

Substance

Mixture

CompoundElement

Heterogeneous

Homogeneous

Molecular

What type of matter?

barium chlorine gas tin (II) chloride

sulfur dioxide water Gatorade

wood solid sulfur silver (I) oxide

air barium sulfide tossed salad

sodium oxide sulfuric acid ammonia

brass stainless steel salt water

18k gold nitrogen dioxide

Physical properties

• melting point• boiling point• shape • luster• size of pieces• crystal

structure

• hardness• malleability• ductility• density• color• mass

• volatility• state• temperature• conductivity• magnetism• volume• solubility

How would you separate…

• A mixture can be separated into its components by physical means.

• A compound can be separated into simpler substances by chemical means only

…the two components of saltwater?

Contents:

Salt and water!

• By evaporating or boiling off the water, leaving the salt

• The hydrogen and oxygen in H2O or the sodium and chlorine in NaCl can be separated only by chemical reactions!

How would you separate…• …answers might include…

Vaporizing

Sorting

Distilling

Dissolving

Liquefying

Filtering

Freezing….

…all physical changes

1) A solution of alcohol and water?2) Mud (water and silt)?3) A mixture of chalk dust and water?4) A mixture of chalk dust and powdered

sugar?5) Beans and rice?6) Ripe and unripe tomatoes?7) The carbon and oxygen in carbon dioxide?

Chemical Reactions

• When a chemical reaction occurs

new substances are formed!

For example

• Water can be separated into hydrogen and oxygen gas (by chemical means only!)

• We write:

H2O H2 + O2

For example

• We write:

H2O H2 + O2

“forms” “and”

For example

• We write:

H2O H2 + O2

Or, better yet

2 H2O2 H2 + O2

For example

2 H2O2 H2 + O2

• The water is gone

• The new hydrogen and oxygen gasses have new chemical and physical properties

2 H2O 2 H2 + O2

2 H2O22 H2O + O2

(hydrogen peroxide forms water & oxygen gas)

2 H2O22 H2O + O2

2 H2O2 2 H2O + O2

First rule of reactions!

• Matter is neither created, nor destroyed.

• The mass before the reaction is the same as the mass after the reaction

First rule of reactions!

• Matter is neither created, nor destroyed.

• The mass before the reaction is the same as the mass after the reaction

• This is called the law of conservation of mass

2 H2O22 H2O + O2

Reactants Products

2 H2O22 H2O + O2

Reactants Products

2 H2O22 H2O + O2

Reactants Products

Same atoms = same mass

Reactants Products

Unit 1 Matter “If we all did the things we are capable of doing, we would literally astound...

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