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