Aradioactive nuclide is used to detect eye tumors. an atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. which is symbol of this radionuclide?

Explanation:- Atomic number is the number of protons or the number of electrons.

Mass number is the sum of number of protons and number of neutrons.

Atomic number = number of electrons= number of protons = 15

Mass number = number of protons + number of neutrons= 15+17= 32.

The representation of element is :

where Z= atomic number, A= mass number , X= chemical symbol of element

The representation of the element with atomic number 15 and mass number 32 is :  

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons