Matter Pre-Assessment

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

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What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio.

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What is a mixture?

Back

A mixture is a combination of two or more substances where each retains its own properties and can be separated by physical means.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a type of mixture where the different components can be seen and easily separated, such as a salad.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

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What is a chemical formula?

Back

A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound.

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What is filtration?

Back

Filtration is a physical process used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through.

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What is the difference between a compound and a mixture?

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A compound consists of two or more elements chemically bonded together, while a mixture consists of two or more substances that are physically combined.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element, consisting of protons, neutrons, and electrons.

Front

What is a molecule?

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A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.