Question

X3 - 36 electrons and 45 neutrons what is the atomic number of x what is the mass number of x

Answer 1

Answer:

atomic number is : number of electrons outside the nucleus or number of  protons inside the nucleus so it will be 36

mass number is : total number of neutrons + total number of protons

we have number of neutrons  = 36 , and we know that number of electrons = no of protons which given =45

,so it will be 36 + 45 = 81