How to find valency of am atom.

1.	How to find valency of am atom.
Answer» We can find the valency of an atom by its atomic number .With the help of atomic number we will fill the K, L and M shells with the k shell with the help of 2n² law and the rest shells with octat law and after filling the number of electrons in the last shell decide the valency...If it satisfy the laws and have 8 or 2 electrons in the last shell then it is a balanced atom but if not then the number of electrons in last shell are the valence electrons. For eg. Sodium Atomic number 11 Configuration - 2,8,1 ( valence electrons - 1) To balance sodium now according to octat law its better to give 1 electron to other then having 7 electrons so if gives 1 electron to other it will have a positive charge • Na+ that\'s why..Chlorine as like it needs 1 electron to balance its atom so if the electron is taken then it contains negative charge..so Cl- It will be my pleasure if u get it

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