The electrons in the outer shell of an atom are called ____. For an atom to be considered ____, it needs to have a full valence electron shell. If an atom has an incomplete valence shell, it is considered ____. Atoms want to be stable. To become stable, they bond with other atoms and form ____. Atoms can form ____ by losing or gaining electrons to become stable. When an atom loses electrons, it becomes ____ charged and is called a ____. These elements are found on the ____ side of the periodic table and are classified as ____. When atoms gain more electrons to complete their outer shell, they become ____ charged and are called ____. These elements are found on the ____ side of the periodic table and are ____.

Chemical Bonding

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