Question

calculate the radius of third orbit of single ionized helium​

Answer 1

Explanation:

Atomic no. of He, z=2

n=3

$\:r = \: 0.529 \times n2 \div z$

$\: \: r = 0. \:529 \times 3 \times 3 \div 2$

r=2.3805 A'