1. Chemical Formula-

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7th Grade Unit 10 Chemical Reactions and
Compounds Lesson 2 Elements, Compounds,
Mixtures Vocabulary of Instruction
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1. Chemical Formula

• Combination of symbols and numbers that represent
  the elements in a compound. It shows the ratio of
  elements in a compound.

Structural Formula
C16H2N2Cl2 Chemical Formula ???
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2. Compound

• A substance made of two or more elements that are
  chemically bound together in a set ratio (carbon
  dioxide, water, etc.).

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3. Element
Antimony

• A substance that can not be broken down into any
  other substances by chemical of physical means
  (carbon, hydrogen, oxygen, nitrogen, etc).

Natural arsenic
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4. Heterogeneous

• Describes a chemical substance that has two or
  more phases or is made of two or more different
  elements or compounds.

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5. Homogeneous

• Describes a chemical substance that is made of
  two or more of the same kind of elements.

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6. Mixture

• Consists of two or more substances in the same
  place that are not chemically combined.

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7. Molecule

• A substance made of two or more atoms.

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8. Periodic Table

• Scientific tool that organizes information about
  the chemical elements in order of atomic number.

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9. Substance

• A single kind of matter that has distinct
  physical and chemical properties.

Water and steam are two different forms of the
same chemical substance
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10. Symbol

• One or two letters that represent an element from
  the Periodic Table.