A atom M have 82 protons, 126 neutrons and 82 electrons, another species N contain 82 protons, 126 neutrons and 80 electrons, then N is a :
What is the relationship between an atom containing 11 protons, 11 electrons and 11 neutrons, and another atom containing 11 protons, 11 electrons and 12 neutrons?
A species 'X' contains 9 protons, 10 electrons and 11 neutrons. It is