Question

An element with mass number 81 contains 31.7% more neutron as compared to the proton so the atomic number will be

Answer 1

Not sure but most probably the element should be Bromine (Br).

Answer 2

Answer:

Explanation:

Answer: Atomic no. Is 35

Explanation: let no. of portions be x.

No. of neutrons = x + 31.7%. Of x = 1.317x

=> 81 = x + 1.317x

=> 81 = 2.317x

=> x = 34.9 or 35

So, Atomic no. = 35