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InterviewSolution
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Find out the atomic number of an element having 3 shells K, L and M in which M shell has 4 electrons. Identify the element. |
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Answer» An atom of an ELEMENT (X) has its K, L and M SHELLS filled with some electrons. It REACTS with sodium metal to from a compound NaX. The NUMBER of electrons in the M shell of the atom (X) will be Seven.In NaX, Na FORMS Na+ and X forms negtive ions. Thus, X gains one electron to form uni negative ion in which octet will be completed. Hence, X has 7 valence electrons. |
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