Mix and Match 1st section

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Mix and Match (1st section)

• Match each definition with the correct term.
• Definitions
• 1. the smallest basic unit of matter
• 2. a particle made when two or more atoms combine
  
• 3. anything that has mass and takes up space

• Terms
• a. matter
• b. volume
• c. atom
• d. weight
• e. molecule

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Unit 1 Matter and Energy

• Chapter 1 Introduction to Matter
• Section 3 Matter combines to form different
  substances

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Extra Credit Opportunity

• Find 5 common household items that are compounds
  and 5 that are mixtures.
• Write a one page paper ( if typed should be
  double spaced) that names what they are, and how
  the mixtures can be separated. Include your name,
  a title, and uses complete sentences.

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Please bring a jar with a lid from home for the
lab on Monday
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Before and After

• BEFORE, you learned
• Matter is made of tiny particles called atoms
• Atoms combine to form molecules

• NOW, you will learn
• How pure matter and mixed matter are different
• How atoms and elements are related
• How atoms form compounds

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pure or mixed matter?

• What do you think the difference is?
• Anything that is pure is only a single substance
• If something is mixed, it has more than one type
  of atom or molecule

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Are most of the substances around you pure or
mixed matter?

• mixed

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What is the difference between apure substance
and a mixed substance?

• A pure substance has only one type ofatom or
  molecule, while a mixed substancecontains two or
  more differentsubstances.

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Pure or mixed?
Mixed
Mixed
Mixed
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Elements

• An element is a substance that contains only a
  single type of atom
• It can not be separated into smaller pieces
• Examples?
• Silver, gold, helium

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What is the smallest possible amount of an
element?

• An atom

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Why is an element considered to be a pure
substance?

• An element contains only one type of atom.

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Compounds

• A compound is a substance that consists of two or
  more different types of atoms bonded together.
• Many different things are compounds
• Carbon dioxide
• Table salt
• Sodium and chlorine
• Together these are harmless, although separately
  they are poisonous

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What is the relationship between atoms and a
compound?

• A compound is made up of two or more different
  types of atoms bonded together.

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Elements and Compounds

• Based on the diagram, what does the gold in the
  photograph consist of?
• Based on the diagram, what does the dry ice
  consist of?
• Is dry ice a pure substance? Why?

• atoms of gold
• molecules of carbon dioxide, which consist of one
  carbon atom and two oxygen atoms
• Yes it contains only one kind of molecule.

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Mixtures

• A mixture is a combination of different
  substances that remain the same individual
  substances and can be separated by physical
  means.
• Examples
• Seawater (water, salt, other minerals)
• Blood (blood, cells, plasma also another
  mixture)

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Comparing mixtures and compounds

• Compounds
• Compounds are new substances formed by atoms that
  bond together.
• Compounds can be separated only by breaking the
  bonds between atoms.
• The proportions of different substances in a
  compound are fixed because the type and number of
  atoms that make up a basic unit of the compound
  are always the same.

• Mixtures
• The substances in mixtures remain the same
  substances.
• Mixtures can be separated by physical means.
• The proportions of different substances in a
  mixture can vary throughout the mixture or from
  mixture to mixture.

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If two substances bond together, is the new
substance a compound or a mixture?

• compound

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How is a mixture different from a compound?

• A mixture combines different substances that
  remain those substances.
• A compound has different properties than the
  individual elements that make it up.

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Evenly mixed

• Some mixtures are easy to see, some arent
• When substances are evenly spread throughout a
  mixture, you cannot tell one part of the mixture
  from another part.
• Homogenous mixture
• Typically, these are mixtures that are hard to
  see, like sugar dissolved in water

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Unevenly mixed

• There are many mixtures, such as soil, that have
  different properties in different areas of the
  mixture
• Heterogenous mixture
• Individual pieces can be seen and separated
• A bowl of fruit!

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1.1.3 Questions (assignments)

• KEY CONCEPTS
• 1. What is the difference between pure and mixed
  matter?
• 2. How are atoms and elements related?
• 3. How are compounds different from mixtures?
• CRITICAL THINKING
• 4. Infer What can you infer about the size of
  sugar particles that are dissolved in a mixture
  of sugar and water?
• 5. Infer Why is it easier to remove the ice
  cubes from cold lemonade than it is to remove the
  sugar?
• CHALLENGE
• 6. Apply A unit of sulfuric acid is a molecule
  of 2 atoms of hydrogen, 1 atom of sulfur, and 4
  atoms of oxygen. How many of each type of atom
  are there in 2 molecules of sulfuric acid?