write valeny of Natrium
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The atomic number of sodium is 11 (Z=11). The electronic configuration of sodium can be written as 2, 8, 1. ... Therefore, valence electron in sodium is 1 and it needs to lose 1 electron from the outermost orbit to attain octet. Hence, the valency of sodium is 1.
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Atomic number of sodium is 11. Its electronic configuration is 2,8,1. So, it's clear that sodium needs to lose one electron to attain stability by completing its octet. Thus, its valency is 1.
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