Question

If radius of the first orbit of hydrogen àtom is 0.52 Å.
Than what will be radius of fifth orbit​

Answer 1

Answer:

Formula for Bohr's radius,

rn=n2r1

r3=32×0.53=4.77Ao

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Answer 2

Answer:-

• First orbit of hydrogen atom=r1=0.52Å

We have to find radius of 5th orbit

• According to Bohr's radius

$\boxed{\sf r_n=n^2r_1}$

$\\ \sf\hookrightarrow r_5=5^2\times 0.52$

$\\ \sf\hookrightarrow r_5=25\times 0.52$

$\\ \sf\hookrightarrow r_5=13Å$

Hence radius of the fifth orbit is 13 Angstorm(Å)