Question

Which is the correct symbol for an isotope of bromine with 35 protons and 38 neutrons?

Answer 1

`^(73)_(35)Br`

Step-by-step explanation:

The correct symbol would be

`^(Atomic Mass)_(Atomic Number)Br=^(35+38)_(35)Br = ^(73)_(35)Br`

The top number is the atomic mass of this form of Bromine. The bottom number is its position on the periodic table. The 73 is a bit light. Usually the weight is closer to 80.