Question

Some one telling me valency of chromiun is 2.someone telling 3 and 4 and 6.What is the correct valency

Answer 1

The valence electrons of chromium include its 4s and 3d electrons, because they are close enough in energy that more than one electron can be used to bond. Its electron configuration as an atom is [Ar]3d54s1 , so it has 6 valence electrons. There most certainly cannot be 4 or 2 (that's just impossible...


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