The atom of an element has 9protons 9 electrons and 10 neutrons 1 what is the atomic no . of the element 2 predict the valancy of the element
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i) The atomic number of element = Number of protons = 9
The element is fluorine (F).
(ii) Electronic distribution =2,7(K,L)
In order to complete its octet it requires one electron so, valency =8 - 7 = 1
The valency of the element is 1.
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atomic no is no of protons 9
valency 1
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