elements, compounds and mixtures katina peck. 3 categories of matter elements compounds mixtures cu...
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ELEMENTS
,
COMPOUNDS
AND MIX
TURES
KATIN
A PECK
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3 CATEGORIES OF MATTER• Elements• Compounds• Mixtures
Cu
H2
O
Pizz
a
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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.
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COMPOUNDS
• Compounds are made up of two or more different elements.
• Compounds have different properties than the elements that make it up.
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COMPOUNDS
H2O
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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
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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.
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MIXTURE
Heterogene
ous
Homogeneo
us
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MOLECULE
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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.
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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
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COLLOIDS• A heterogeneous mixture that
never settles. • Example: Milk• Scatters light
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SUSPENSION• A heterogeneous mixture that
has particles that settle.• Example: Italian salad dressing