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Question: The energy required to excite an electron from the ground state of hydrogen atom to the first excite...

The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is.

A

1.602×10−14J1.602 \times 10^{- 14}J

B

1.619×10−16J1.619 \times 10^{- 16}J

C

1.632×10−18J1.632 \times 10^{- 18}J

D

1.656×10−20J1.656 \times 10^{- 20}J

Answer

1.632×10−18J1.632 \times 10^{- 18}J

Explanation

Solution

Energy to excite the e−e^{-} from n=1n = 1 to n=2n = 2

E=−3.4−(−13.6)=10.2eV=10.2×1.6×10−19=1.632×10−18JE = - 3.4 - ( - 13.6) = 10.2eV = 10.2 \times 1.6 \times 10^{- 19} = 1.632 \times 10^{- 18}J.