Elements
Compounds
and
Mixtures

ELEMENTS

• are pure substances
• made up of the same atoms
• can be broken down into one atom

EXAMPLES OF AN ELEMENT

• Sodium (Na)
• Chlorine (Cl)
• Hydrogen (H)
• Oxygen (O)
• Nitrogen (N)

COMPOUNDS

• two or more elements combined chemically
• can be broken down into individual elements

EXAMPLES OF A COMPOUND

• Water
• Hydrogen Peroxide
• Salt
• Methane
• Alcohol

MIXTURES

• a combination of substances but doesn't make a new substance
• can be easily separated
• has two types of mixtures: heterogeneous and homogeneous

HETEROGENEOUS
+ not uniform throughout
+ can be seen

HOMOGENEOUS
+ uniform throughout
+ substance mixed well enough so we can't see each component

EXAMPLES OF MIXTURES

• Water and Oil (heterogeneous)
• Soil (heterogeneous)
• Salad (heterogeneous)
• Kool-Aid (homogeneous)
• Salt Water (homogeneous)

COMMON ELEMENTS IN THE EARTH'S CRUST