Periodic Table of Elements

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The unit used to express the mass of the particles in an atom.

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AMU (Atomic Mass Unit) is the standard unit of mass that quantifies mass on an atomic or molecular scale.

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The region inside an atom where electrons are likely to be found.

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Electron Cloud is the area around the nucleus of an atom where electrons are likely to be found.

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Located along the zig-zag line on the periodic table of elements, these elements have properties of both metals and non-metals.

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Metalloids are elements that have properties of both metals and non-metals, found along the zig-zag line on the periodic table.

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Located on the right-hand side of the periodic table of elements, these elements are dull and poor conductors.

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Non-Metals are elements that are typically dull, brittle, and poor conductors of heat and electricity.

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The total number of protons and neutrons in the nucleus of an atom.

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Mass Number is the sum of protons and neutrons in the nucleus of an atom.

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The smallest unit of an element that retains the properties of that element.

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Atom is the basic unit of a chemical element.

Tags

NGSS.MS-PS1-1

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A substance that cannot be broken down into simpler substances by chemical means.

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Element is a pure substance that consists entirely of one type of atom.

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The number of protons in the nucleus of an atom, which determines the element's identity.

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Atomic Number is the number of protons in the nucleus of an atom.

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Elements that are good conductors of heat and electricity, typically found on the left side of the periodic table.

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Metals are elements that are typically shiny, malleable, ductile, and good conductors of heat and electricity.

Tags

NGSS.MS-PS3-3

Front

The horizontal rows in the periodic table, which indicate the number of electron shells in the elements.

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Periods are the horizontal rows in the periodic table.