Question

what is valency and valence shell

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Answer 1

Explanation:

Valence electron is simply the total number of electrons present in outermost shell of an atom.

Valency is the number of electrons an atom looses,gains or shares with other atoms in order to get a stable configuration.

Answer 2

Answer:

valency :the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules. The concept of valence was developed in the second half of the 19th century and helped successfully explain the molecular structure of inorganic and organic compound

valence shell : an electron of an atom, located in the outermost shell (valence shell) of the atom, that can be transferred to or shared with another atom.

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