Properties of Matter

1
Properties of Matter

• Ch 2

2
What is matter?

• Anything that has mass and takes up space
• The basic building blocks of matter are atoms-
  the smallest particle of an element
• Matter can be classified as pure substances and
  mixtures

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Pure Substances

• Matter that always has the same composition
• Ex table salt- each pinch of salt tastes the
  same
• Pure substances have a fixed, uniform composition

• Pure substances are categorized as elements or
  compounds

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Elements

• A substance that cannot be broken down any
  further
• No two elements contain the same type of atom
• Where can we find elements listed?
• Examples

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Elements cont.

• Elements are represented by symbols on the
  periodic table
• Symbols are one or two letters
• First letter is always CAPITALIZED, second letter
  is always lowercase
• Where did these symbols come from?

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Compounds

• A substance made up of 2 or more substances and
  can be broken down into simpler substances
• The properties of a compound differ from the
  properties of the elements that make it up
• H2O made up of hydrogen and oxygen
• Examples

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Mixtures

• A blend of 2 or more substances, each retaining
  their own characteristics
• Can usually be separated by physical means
• The composition of a mixture is not fixed
• Mixtures can be heterogeneous or homogeneous

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Types of mixtures

• Heterogeneous
• Hetero - different
• The parts of a mixture are noticeably different
  from one another
• Ex sand

• Homogeneous
• homo same
• Substances are so evenly distributed, it is hard
  to distinguish one from the other
• Appears to contain only one substance
• Ex swimming pool water, stainless steel

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Solutions, Suspensions and Colloids

• The size of the particle in a mixture has an
  effect on the properties of a mixture
• Based on the size of its largest particle, a
  mixture may be classified as a solution,
  suspension or colloid
• Read the pg 42-43, fill in the table on your
  worksheet

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What is it? Particle size Can it be separated? How? Examples
Solution
Suspension
Colloid
p229 look up and define Solvent Solute