Friday, 5 January 2018

Explain with examples Question 8 from Chapter 4. Structure Of The Atom

(i) Atomic number, (ii) Mass number, (iii) Isotopes and ( iv) Isobars. Give any two uses of isotopes.

Answer : 
(i) Atomic number : Atomic number of  an element  is defined as  the number of protons present in its atom.  It is denoted by 'Z'.

(ii) Mass number : The mass number is defined as the sum of the total number of protons and neutrons present in the nucleus of an atom.

(iii) Isotopes :Isotopes are defined as the atoms of the same element, having the same atomic number but different mass numbers.

( iv) Isobars : Atoms of different elements with different atomic numbers, which have the same mass number, are known as isobars.

Two uses of isotopes : 
(i) An isotope of uranium is used as a fuel in nuclear reactors.
(ii) An isotope of cobalt is used in the treatment of cancer.

This is an answered question from Chapter 4. Structure Of The Atom of CBSE Class 9th Science

Check for Complete Exercise Solution for Chapter 4. Structure Of The Atom | CBSE Class 9th Science

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