Atoms, Molecules, and Compounds Rule!

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What is an atom?

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An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus containing protons and neutrons, surrounded by electrons.

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What is a molecule?

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A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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NGSS.MS-PS1-1

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What is a compound?

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

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NGSS.MS-PS1-1

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more different elements that are chemically combined.

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What are the three states of matter?

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The three states of matter are solid, liquid, and gas, which differ in the arrangement and energy of their particles.

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What is a chemical bond?

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A chemical bond is a lasting attraction between atoms, ions, or molecules that enables the formation of chemical compounds.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

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NGSS.MS-PS1-5

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What is a chemical reaction?

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A chemical reaction is a process that leads to the transformation of one set of chemical substances to another, involving the breaking and forming of bonds.

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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 and can be separated by physical means.

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What is the periodic table?

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The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, which displays their properties and relationships.