What are isotopes? Give examples.
(a) What are radioactive isotopes ? Give two examples of radioactive isotopes.
(b) Give any two uses of radioactive isotopes.
(c) An element Z contains two naturally occurring isotopes Z1735 and Z1737. If the average atomic mass of this element be 35.5 u, calculate the percentage of two isotopes.
Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes.