Elements and Compounds FLASHCARDS

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The smallest particle of an element; made of electrons, protons, and neutrons.

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A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms in the smallest unit of a substance.

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Chemical Formula

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Chemical symbol: He, Atomic number: 2, Atomic mass: 4.00260

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A new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a chemical reaction.

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Compound

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is an example of a compound formed by the chemical bonding of carbon and oxygen.

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Carbon dioxide (CO₂)

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An element is a pure substance composed of the same type of atom throughout.

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A molecule is the simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically.

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Molecule diagram showing atoms joined together chemically

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A table in which all the known elements are arranged by properties and are represented by chemical symbols.

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The third element in the periodic table with atomic number 3.

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Lithium (Li)

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The fourth element in the periodic table with atomic number 4.

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Beryllium (Be)