Elements Compounds and Mixtures Review

Elements

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

• are made of one type of atom

• are made of two or more types of molecules combined in the same space

• are always individual atoms

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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

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Mixtures

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

• Are only liquids

• Cannot be separated

• Can be separated using physical properties

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

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

• atom

• molecule

• electron

• neutron

Which of the following are examples of Compounds?

• Salt

• Salt Water

• N₂ + O₂

• C₆H₁₂O₆

• Co

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Which of the following are examples of a Pure Substance?

• Water

• He

• Orange Juice

• Uranium

• Sugar

Which of the following are examples of Mixtures?

• The atmosphere

• Carbon Dioxide (CO₂)

• O₂

• Lemonade

• Anything on the Periodic Table

What can be inferred from the picture?

• Elements are always made of individual atoms

• Mixtures contain only one type of molecule

• Molecules always make compounds

• Compounds are pure substances

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What is the difference between an atom and a molecule?

• Molecules are groups of atoms held together physically

• Molecules are groups of atoms held together chemically

• Molecules are mixtures

• Molecules are only found in the gas state of matter, while atoms can form solids, liquids, and gasses

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