(a) Distinguish between isotopes and isobars, giving one example for each.

(b) Why is the mass of a nucleus always less than the sum of the masses of its constituents? Write one example to justify your answer.

 

 

Answers (1)
S safeer

(a)Isotopes are the atoms having the same atomic number 

E .g.  _{17}^{35} \textrm{Cl}\; and\; _{17}^{37}\textrm{Cl}                                                                                           

 Isobars are the atoms  having the same mass number

 Eg. _{2}^{3} \textrm{He}\; and\; _{1}^{3}\textrm{H}                                                                    

(b) Mass of a nucleus is less than its constituents because, in the bound state, some mass is converted into binding energy.

eg. mass of _{8}^{16} \textrm{O}\; nucleus is less than the sum of masses of 8 protons and 8 neutrons.   

Preparation Products

Knockout NEET July 2020

An exhaustive E-learning program for the complete preparation of NEET..

₹ 15999/- ₹ 6999/-
Buy Now
Rank Booster NEET 2020

This course will help student to be better prepared and study in the right direction for NEET..

₹ 9999/- ₹ 4999/-
Buy Now
Knockout JEE Main July 2020

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 12999/- ₹ 6999/-
Buy Now
Test Series NEET July 2020

Take chapter-wise, subject-wise and Complete syllabus mock tests and get in depth analysis of your test..

₹ 4999/- ₹ 2999/-
Buy Now
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 11999/-
Buy Now
Exams
Articles
Questions