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A. An element with the valence electron configuration 4s would form a monatomic ion with a charge of In order to form this io
A. A main group element with the valence electron configuration 5s1 is in periodic group It forms a monatomic ion with a char
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Answer #1

A. Monatomic ion is formed by removing one electron from 4s subshell , so one electron is left in 4s subshell after forming monatomic ion. Charge is +1

B. Three electron s are removed from 4s23d6 . As 4s subshell are higher in energy than 3d subshell, so first two electrons are removed from 4s subshell and one from 3d subshell.

5s1 valence configuration is got by Rb ( rubidinium) and it belong to first group of periodic table and form monatomic ion of charge +1.

4s24p5 is valence configuration of bromine which belong to 17 group in periodic table abdaform monatomic ion having charge -1.

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