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Yes, the word 'valiance' is a common, abstract noun, a word for the qualities of a hero or heroine; exceptional or heroic courage when facing danger.
The quality or state of being valiant; bravery; valor.
No, the valiance electrons don't balance.
The abstract noun forms of the adjective valiant are valiantness and valiance.
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.