The atom of an element X has 7 electrons in its M shell. (a) Write the electronic configuration of element X. (b) What is the atomic number of element X? (c) Is it a metal or a non-metal? (d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed. (e) What could element X be?
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Answer:(a) Electronic configuration of the element X is
Element X:
(b) Atomic number of the element X will be 17.
(c) Element X is a non-metal because there are 7 electrons in its outermost orbit. In order to complete its octet (to get 8 electrons), it will gain one electron. An element which gains electrons in order to complete its octet is a non-metal.
(d) The element will form an anion by gaining an extra electron in order to complete its octet.
Symbol of an ion of X will be X–.
(e) X is Chlorine.
Explanation: I think this may help you
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