Question

The outermost electronic configuration of two elements are given below. X-3s 2. Y-3s 2 ,3p 5
a) Write the complete subshell electronic configuration of the element X.
b) Which element shows valency '1' ?
c) Write the chemical formula of the compound formed by the reaction between X&Y .​

Answer 1

Answer:

a) 1s2 2s2 2p6 3s 2

b)Y element

c)XY2

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