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The energy of electron in hydrogen atom in its grounds state is -13.6 eV. The energy of the level corresponding to the quantum number equal to 5 is:
(1) -0.54 eV
(2) - 0.85 eV
(3) - 0.64 eV
(4)- 0.40 eV
Ans: -0.54 eV
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The total number of unpaired electrons in d- orbital's of atoms of element of atomic number 29 is: (1) 10 (2) 1 (3) 0 (4)5 Ans: 0
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