Question

The covalent radius of sodium atom is 1.8×10⁸m while the wavelength of visible light is approximately 500×10-⁹m. Compare these lengths.​

Answer 1

Answer:

n¥ = 2πr

where r is radius of orbit

so r = 0.53 n²/z

n is orbit ( here n =2)

and ¥ is lemda i.e wavelength

substitiing all the values

u ll get the value of r

and circumference is equal 2πr