Question

Energy of an electron is given by E = – 2.178 × 10⁻¹⁸J(Z²/n²).
Wavelength of light required to excite an electron in an
hydrogen atom from level n = 1 to n = 2 will be :
(h = 6.62 × 10⁻³⁴ Js and c = 3.0 × 10⁸ ms⁻¹)
(a) 1.214 × 10⁻⁷ m (b) 2.816 × 10⁻⁷ m
(c) 6.500 × 10⁻⁷ m (d) 8.500 × 10⁻⁷ m

Answer 1

Explanation:

Energy of an electron is given by E = – 2.178 × 10⁻¹⁸J(Z²/n²).

Wavelength of light required to excite an electron in an

hydrogen atom from level n = 1 to n = 2 will be :

(h = 6.62 × 10⁻³⁴ Js and c = 3.0 × 10⁸ ms⁻¹)

(a) 1.214 × 10⁻⁷ m

(b) 2.816 × 10⁻⁷ m

(c) 6.500 × 10⁻⁷ m✔️✔️✔️

(d) 8.500 × 10⁻⁷ m

Answer 2

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(c) 6.500 × 10⁻⁷ m

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$\huge{\underline{\underline{\mathfrak{Thank you}}}}$