Flashcard Classify Matter

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. The individual components are not distinguishable and are evenly distributed, such as saltwater.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the individual components are distinct and can be easily identified, such as a salad or a mixture of sand and iron filings.

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Define an element.

Back

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

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What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together, such as water (H2O) or sodium chloride (NaCl).

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What is a pure substance?

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A pure substance is a material that has a constant composition and properties throughout. It can be an element or a compound.

Front

Classify the substance O2.

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O2 is classified as an element because it consists of only one type of atom (oxygen).

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What is a mixture?

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A mixture is a combination of two or more substances that can be physically separated. Mixtures can be homogeneous or heterogeneous.

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Classify salt (NaCl).

Back

Salt (NaCl) is classified as a compound because it is made up of two different elements (sodium and chlorine) that are chemically bonded.

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What is the difference between a compound and a mixture?

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A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a combination of substances that are not chemically bonded and can be separated by physical means.

Front

What is an atom?

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