The Bohr's orbit radius for the hydrogen atom (n = 1) is approximately 0.53 A. The radius for the first excited state (n = 2) orbit is:

0.27 A

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1.27 A

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2.12 A

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3.12 A

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Solution

The correct option is C 2.12 A
Radius of nth orbit of hydrogen atom
$r_{m} = 0.529 \times n^{2}$
Given n = 2 (where n is no. of orbit)

$∴ r_{n} = 0.529 \times (2)^{2} = 2.12 A$

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Similar questions

The Bohr orbit radius for the hydrogen atom ( n= 1) is approximately 0.530 $A^{\circ}$ . The radius for the first excited state (n=2) orbit is:

n = 1

0.53 A^{o}

n = 2

A^{o}

0.53 \times 10^{- 10} m

2.12 \times 10^{10} m

n

Calculate the radius of the third orbit of a hydrogen atom; the radius of the first Bohr orbit of hydrogen atom is 0.53 Å.

0.53 \circ A

L i^{2 +}

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