Chemistry Structure of Atom Atomic Structure

The energy of an electron in the ground state (n = 1) for He+ ion is –x J, then that for an electron in n = 2 state for Be3+ ion in J is

1
-x
2
\(\rm -\frac{x}{9}\)
3
-4x
4
\(\rm -\frac{4}{9}x\)

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