Question

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Question : An atom has electronic configuration 2, 8, 7.
(a) What is the atomic number of this element?
(b) To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.
1.N(7)
2.F(9)
3.P(15)
4.Ar(18)

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Answer 1

Hello friend...

Here is your answer...

a. atomic number of element having electronic configuration 2,8,7 is 17 which is chlorine.

b. it would be chamically similar to the element Florine which have electronic configuration 2,7.they will be similar cosmically because they have same valencies.

I hope it will help you.

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Answer 2

Post the questions of 50 points.....