Basic Concepts of Matter

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Atoms

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often referred to as the building blocks of matter.

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Elements

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substance composed of one type of atom and cannot be broken down into a simpler substance.

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Structure of an atom

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Atoms contain a nucleus surrounded by an electron cloud with energy levels

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The electron cloud consists of energy levels.

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consists of one or more energy levels.

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Inner Structure of an Atom

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contains protons and neutrons

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Neutrons

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sub atomic particles with no charge

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Energy Levels

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Where electrons are accommodated

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First Energy Level

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can hold a maximum of 2 electrons.

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Principal energy level 1

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Has a maximum number of 2 electrons

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Principal energy level 2

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Can hold a maximum number of 8 electrons