Elements, Compounds, and Mixtures

​Elements, Compounds, and Mixtures

​Classifying Matter

In science, properties are ​the characteristics that enable us to differentiate one material from another.

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A synonym is characteristic or trait.​

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​What is a property?

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All of the known elements of the world can be found on the periodic table.

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In different combinations, they are the building blocks of all matter!​

​Elements

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Elements CANNOT be broken down into simpler substances.

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One unit of an element is called an atom.

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​Some text here about the topic of discussion.

​Elements

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Multiple Choice

Elements

• are made of two or more types of atoms bonded together

• are made of one type of atom

• are made of two or more types of molecules

• are always individual atoms

Multiple Choice

Which is the smallest particle of an element that has the same properties as that element?

• atom

• molecule

• compound

• chemical

Multiple Choice

A substance that cannot be broken down further chemically is known as...

• an element

• a compound

• a molecule

• a mixture

Multiple Select

Which of the following are examples of ELEMENTS? Choose all that are correct.

• Oxygen (O)

• Water

  (H₂O)

• Flourine

  (F)

• Lemonade

• Sulfur Dioxide (SO₂)

Compounds are two or more DIFFERENT elements chemcially bonded together. This means that they cannot be separated easily. ​

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​Compounds

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The bonds holding the atoms together are very strong. The properties of the atoms make them very attracted to each other (which creates the bond!)

​Chemical Bonds

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​Making Compounds

Not all elements combine to form compounds. But, when they do, the properties of those elements change and, together, they become a unique substance with different properties. ​

Multiple Choice

Compounds

• are made of two or more types of atoms chemically bonded together

• are made of one type of atom

• are found on the periodic table

• can be separated into their individual parts through physical means

Multiple Select

Which of the following are examples of compounds? Check all that apply.

• Salt

  (NaCl)

• Salt Water

  (NaCl and H₂O)

• Sugar

  (C₆H₁₂O₆)

• Carbon Dioxide

  (CO₂)

Multiple Choice

The bonds of compounds can be broken easily becasue they are not chemically bonded.

• True

• False

Multiple Choice

When substances combine chemically...

• they form a mixture and their properties change

• they form a compound and their properties change

• they form a mixture where their properties stay the same

• the form a compound where their properties stay the same

A mixture is a material made up of two or more different substances which are not chemically bonded. This means that the substances keep their original properties.

​Mixtures

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General properties of a mixture:

● The components of a mixture can be easily separated

● The components each keep their original properties

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​Characteristics of Mixtures

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Multiple Select

Which of the following are examples of Mixtures?

• The atmosphere

  (N + O + Ar + H₂O...)

• Carbon Dioxide (CO₂)

• Oxygen

  (O₂₎

• Lemonade

  (sugar, lemon juice, water)

• Anything on the Periodic Table

Multiple Choice

Mixtures

• are made of two different types of atoms chemically bonded together

• Are only liquids

• Cannot be separated

• Can be separated using physical properties

A pure substance has constant chemical composition and characteristic properties.​

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​Pure Substance

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A pure substance does not have to be of a single element or compound.

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​Pure Substances

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Multiple Choice

Pure Substances

• Are only made of one type of atom

• Have the same properties throughout

• Can never be broken down into something simpler

• Are only made of molecules

Multiple Select

Which of the following are examples of a Pure Substance?

• Water

  (H₂O)

• Helium

  (He)

• Orange Juice

  (oranges, water)

• Uranium

  (Ur)

• Sugar

  (C₆H₁₂O₆)