An atom has electronic configuration 2,8,2 1) What is the atomic number of this element 2) What is its valency 3) To which of the following elements would it be chemically similar and why Be or O
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The element is Magnesium.
1)atomic no. = 12
2)valency = 2
3) it would be chemically similar as Be . because they belong from same group(2).
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