a) What is the chemical name of this element? b) Write the electron configuration of X'. c) Write the noble gas configuration of 'X*. d) Find the number of electrons in 'X". e) How many Energy levels are present in this element?

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Q: PV 4) Solve for T: =DR %3D nT 5) Solve for b: a2 + b² = c2 6) Solve for r: A = ar2

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