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brooky04
If the outer shell is filled, the atom is stable. Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability. Example of an unstable atom with a single electron in its outer-most shell. ... In covalent bonds, atoms share electrons to achieve stability.

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Answer:  By fulfilling octet of the outermost valence shell.

Explanation:  Chemical bonding is the attraction between the atoms , ions or molecule that helps in the formation of the chemical compound.

The bond between the two species can be formed either by sharing of valence shell electrons or by donating electron of the valence shell of one specie to the other.

When the formation of the bond takes place, it will try to complete the octet of the species that are involved in the bond making. This completion of the octet provide stability to the compound .

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