The total energy of an electron in the first excited state of hydrogen atom is about -3.4 eV. Its kinetic energy in this state is
A. 3.4 eV
B. 6.8 eV
C. – 3.4 eV
D. – 6.8 eV
Answer:A
The total energy of an electron in the first excited state of hydrogen atom is about -3.4 eV. Its kinetic energy in this state is
A. 3.4 eV B. 6.8 eV C. – 3.4 eV D. – 6.8 eV