Understanding Elements, Compounds, and Mixtures: Properties and Classification, Lecture notes of Chemistry

Download Understanding Elements, Compounds, and Mixtures: Properties and Classification and more Lecture notes Chemistry in PDF only on Docsity!

Elements. Compounds and

MixturesMixtures

Matter – is anything that occupies space and has

mass.

Matter can be solid, liquid or gas. •^

Mass – is the amount of matter in an object.

-^

Volume – is the occupied space.

-^

Matter can be classified as pure substancesand mixtures.

-^

Diatomic element – made of two atoms of thesame element.Ex. H

, O 2

, N 2

, I 2

2,

Cl

, F 2

, Br 2

2

A diatomic element may also be called aA diatomic element may also be called a diatomic molecule.Molecule – 2 or more atoms of same ordifferent elements chemically combined.

Elements

Most common

H

2

N

2

O

2

Memorize

Uncommon

S

8

Li C Al

O

2

F

2

Cl

2

Br

2

I

2

S

8 O^3

Al

Compound

HCl

LiOH CH

CO

CH

4

AlCl

3

CO

2

H

S 2

Mixture – is the combination of elements orcompounds in different ratios. •^

is made up of two or more different substancesphysically combined

-^

Properties of the substances that make it up areretained.

-^

Can be physically separated

-^

Mixtures can be classified as homogenous orheterogenous.

-^

Heterogenous mixture –not evenly mixed

-^

More than one phase is shown

-^

Example:

fruit salad,

choco

chip cookie

-^

Example:

fruit salad,

choco

chip cookie

-^

Mixtures can be physically separated indifferent ways