Question

An isotope of an element has 50 electrons, 51 protons and 70 neutrons. What is the element symbol of the element

Answer 1

Solution

In isotopes number of protons will remain same but have different number of neutrons

Given, the number of protons = 51 =

So, the element with 51 protons = Antimony

Atomic number = number of protons = 51

Atomic mass number = number of protons + number of neutrons = 51 + 70 = 121

Symbol of antimony = Sb

In neutral atom number of protons = no of electrons

But here no of electrons = 50

So the symbol of element with 51 protons ; 50 electrons and 70 neutron = ₅₁¹²¹Sb⁺