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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
Neutrons are found in atoms of all elements except in: (1) Chlorine (2) Oxygen (3) Argon (4)Hydrogen Ans: Hydrogen
Extension
PFEFFER METHOD
NaH + H2O ->
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