Question

In which of the following case velocity of electron equal to 2nd Bohr orbit of He* ion? n=1 of H-atom On=4 of Be³+ on=3 of Li²+ O All of these​

Answer 1

Explanation:

refer to the attachment

hope it helps✌✌

Answer 2

Explanation:

The two numbers will be 59 & 77

Step-by-step explanation:

Let one of the nos. be x.

The other no. will be x+18

Therefore,

x + x + 18 = 136

2x + 18 = 136

2x = 136 - 18

2x = 118

x = ¹¹⁸/2

x = 59 &

x + 18 = 59 + 18 = 77