Question

if element has 7 neutrons and mass number is 12 then write its representation​

Answer 1

Given:-:

Neutron number= 7

Atomic mass= 12

To find :-

The representation

•Solution:-

We know

Atomic number= proton number

Atomic mass = Proton number+ Neutron number

Neutron= - Proton number + Atomic mass

Proton number = Atomic mass - Neutron number = 12 -7 = 5

and we know that the element is determined by the proton count .

As the proton number is 5

So this element is written as B-11.