Elements A and B have atomic number 9, 20 respectively. Give the electronic configuration of them and formula formed by them.
Answers
Answer:
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Explanation:
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Answer:
(a)
i)a non metal is A because a has electronic configuration 2,7 and it will accept one .
ii) a metal is B because its electronic configuration is
2,8,8,2 and it will give the two electrons in its valance cell.
iii) chemically inert-C because it's atomic number is 10 and configuration would be 2,8 so it has completed its outermost (valence) cell
(b) A and B will only react as they are not chemically inert