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6 16 10 1 : 8 (water) 6 (6 ) 2 3 3 : (meat) (meat) ISOTOPES Isotopes of an element may be defined as: The atoms of an element having same atomic number but different atomic masses, are called isotopes of that elements. Or Atoms of an element having same no of protons and same no, of electrons but different no of neutrons are called isotopes of that element. Or Atoms of an element having same chemical properties but different physical properties are called isotopes of that element. For example carbon element has three isotopes, which are known as5c- 12 c-13 c-14a All these isotopes of carbon have same no, of protons ( ie, b ) same no of electrons ( ie, 6 ) but different no of neutrons i-e 6, 7 and 8 respectively in c-12, c-13, c-14.Other examples are, Hydrogen has 3 isotopes, oxygen has three, Nickle ( Ni ) has five, calcium has six, palladium has six, cadmium has nine and tin has ii isotopes. 03007570935