Atoms And Valence Electrons Reference Sheet

Atoms and Valence Electrons Reference Sheet

Valence Electrons: those electrons that have the highest energy level and are held most loosely.

Electron Dot Diagram: a diagram that includes the symbol for the element surrounded by dots.

Each dot stands for one valence electron.

Chemical Bond: the force of attraction that holds two atoms together as a result of the

rearrangement of electrons between them.

How does the Periodic Table Work?

Read the table from left to right across the period

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As the atomic number increase, the number of electrons also increases

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A given period ends when the number of valence electrons reaches eight (exception:

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Hydrogen & Helium)

The elements within a group (a vertical row) all have the same number of valence electrons

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and similar properties

Electron Dot Diagram Examples:

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