MS-PS1-1: Atoms and Molecules

Front

Element Noun

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[el-uh-muhnt]

Back

Element

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A fundamental substance made of a single type of atom that cannot be broken down into a simpler form.

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Example: An oxygen atom is shown with protons, neutrons, and electrons, illustrating an element made of one type of atom.

Front

Particle Noun

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[par-ti-kuhl]

Back

Particle

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The smallest possible piece of any substance that still retains the chemical and physical properties of that substance.

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Example: An atom diagram showing electrons, protons, and neutrons, illustrating particles that make up matter.

Front

Atom Noun

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[at-uhm]

Back

Atom

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The smallest particle of a chemical element that can exist, which can combine with other atoms to form molecules.

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Example: An atom with a nucleus of protons and neutrons, surrounded by electrons in shells.

Front

Chemical Symbol Noun

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[kem-i-kuhl sim-buhl]

Back

Chemical Symbol

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A one or two-letter abbreviation used internationally to represent a chemical element in formulas and equations.

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Example: The image shows 'CO2' with a molecular diagram, teaching how chemical symbols represent compounds.

Front

Compound Noun

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[kom-pound]

Back

Compound

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

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Example: A water molecule is a compound with two hydrogen atoms bonded to one oxygen atom.

Front

Chemical Formula Noun

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[kem-i-kuhl fawr-myuh-luh]

Back

Chemical Formula

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A representation showing the types and numbers of atoms in the smallest unit of a substance using element symbols.

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Example: The image shows the chemical formula H2O, representing water with two hydrogen atoms and one oxygen atom.

Front

Molecule Noun

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[mol-i-kyool]

Back

Molecule

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A group of two or more atoms held together by strong chemical bonds, forming the smallest unit of a compound.

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Example: The image shows hydrogen and oxygen atoms forming a water molecule, demonstrating how atoms bond to create molecules.

Front

Ionic Compound Noun

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[ahy-on-ik kom-pound]

Back

Ionic Compound

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A chemical compound in which atoms are held together by the attraction between oppositely charged ions.

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Example: The image shows how sodium and chlorine atoms form an ionic compound by transferring electrons, resulting in oppositely charged ions.

Front

Crystal Noun

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[kris-tl]

Back

Crystal

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A solid material whose atoms are arranged in a highly ordered, repeating pattern extending in all three dimensions.

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Example: This image shows a crystal lattice of sodium chloride, demonstrating how atoms are arranged in a repeating pattern.

Front

Natural Resources Noun

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[nach-er-uhl ree-sohr-siz]

Back

Natural Resources

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Materials or substances such as minerals, forests, and water that occur in nature and can be used by humans.

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Example: The image shows Earth as a water source, highlighting water as a natural resource used by humans.

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