If the energy for the ground state level (n = 1) of hydrogen is ?13.6 eV, which of the following gives an approximate value for the energy of an electron of the K shell (n = 1) of the element beryllium for which the atomic number = 4?
a. –122 eV
b. –40.8 eV
c. –218 eV
d. –54.4 eV
e. –40.8 eV
c
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