Question

What is the circumference
of the
2nd orbit of (H-atom)
$circumference = 2\pi r$

​

Answer 1

The circumference of the second orbit of an atom or ion having single electron ,is 4×10−9 m.

Answer 2

Answer

13.28

Explaination:

Circumference=2πr

=2×3.14×0.529×n^2/z

=2×3.14×0.529×2^2/1

=25.12×0.529/1

=13.28

Circumference=13.28

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