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.

4.77 Å

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1.59 Å

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1.06 Å

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2.12 Å

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Solution

The correct option is A
4.77 Å

Try to recall the formula for radius of nth orbit from Bohr's postulates.

$r_{n}$ = $r_{1}$ ( $n^{2}$ )

= $r_{1}$ ( $3^{2}$ ) Where $r_{1}$ is the radius corresponding to the ground-state $n = 1$

= $0.53$ $\times$ $9$ = $4.77 Å$

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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.

The correct option is A 4.77 Å Try to recall the formula for radius of nth orbit from Bohr's postulates. rn = r1 (n2) = r1 (32) Where r1 is the radius corresponding to the ground-state n=1 = 0.53 × 9 = 4.77 Å

The correct option is A
4.77 Å

Try to recall the formula for radius of nth orbit from Bohr's postulates.

$r_{n}$ = $r_{1}$ ( $n^{2}$ )

= $r_{1}$ ( $3^{2}$ ) Where $r_{1}$ is the radius corresponding to the ground-state $n = 1$

= $0.53$ $\times$ $9$ = $4.77 Å$