ELEMENTS

,

COMPOUNDS

AND MIX

TURES

KATIN

A PECK

3 CATEGORIES OF MATTER• Elements• Compounds• Mixtures

Cu

H2

O

Pizz

a

ELEMENTS

Elements are the building blocks of matter.

Cu

Everything in the Universe is made from about 118 elements.

Each element is made up of the same type of atoms.

COMPOUNDS

• Compounds are made up of two or more different elements.

• Compounds have different properties than the elements that make it up.

COMPOUNDS

H2O

COMPOUNDS

• Formulas are made of the symbols and a subscript number.

• The subscript is the number of atoms of that element.

• A coefficient tells us how many molecules

• there are.Coefficient

Subscript

MIXTUREMost of the matter in the Universe is a compound or a mixture.

•A mixture is made of two or more substances that are not chemically combined.

•Substances in a mixture retain their properties.

MIXTURE

Heterogene

ous

Homogeneo

us

MOLECULE

COMPARISON• A molecule is formed when

two or more atoms join together chemically.

• A compound contains at least two different elements.

• All compounds are elements, but not all elements are compounds.

SOLUTION• A homogeneous mixture.

• Solute- the substance being dissolved.

• Solvent- the substance that dissolves a solute.

• Solubility- the amount of solute that will dissolve in a solvent. Solvent

SoluteSolution

Solute

COLLOIDS• A heterogeneous mixture that

never settles. • Example: Milk• Scatters light

SUSPENSION• A heterogeneous mixture that

has particles that settle.• Example: Italian salad dressing