SSA-Physical Science Review

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What is a compound?

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A compound is a pure substance formed when two or more elements are chemically bonded together. Compounds can only be separated into their constituent elements by chemical means.

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What indicates a chemical change?

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Indicators of a chemical change include a change in color, production of energy (heat or light), and formation of gas. All of these are signs that a chemical reaction has occurred.

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical or physical means. Examples include hydrogen, oxygen, and carbon.

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What is Carbon Dioxide classified as?

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Carbon Dioxide (CO2) is classified as a compound because it consists of two different elements, carbon and oxygen, chemically bonded together.

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What are protons?

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Protons are subatomic particles found in the nucleus of an atom that have a positive charge. They are one of the three main types of subatomic particles, along with neutrons and electrons.

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded. The individual components retain their own properties and can be separated by physical means.

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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 chemically bonded together, while a mixture is a physical combination of substances that can be separated without chemical reactions.

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What are neutrons?

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Neutrons are subatomic particles found in the nucleus of an atom that have no charge (neutral). They contribute to the atomic mass of an element.

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What is the atomic mass?

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The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus.

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What is an isotope?

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Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.