English
Hindi

Question

Download Solution PDF

The ratio of the nuclear radii of elements with mass numbers 216 and 125 is 

  1. 216 : 125
  3. 6 : 5
  4. none of these

Answer (Detailed Solution Below)

Option 3 : 6 : 5
Free Tests
View all Free tests >
Free
CRPF Head Constable & ASI Steno (Final Revision): Mini Mock Test
40 Qs. 40 Marks 45 Mins
Start Now

Detailed Solution

Download Solution PDF

CONCEPT:

  • A nucleus of an atom is made up of neutron and proton, and they are called nucleons.
  • The radius of the nucleus is given by

Where R0 = 1.2 fm , A = Mass number

CALCULATION:

Given A1 = 216 and A2 = 125

  • The radius of the first & second nuclei is given by

     ---- (1)

     ---- (2)

The ratio of is given by

  • Hence, option 3 is the answer

Download Solution PDF
Latest Indian Coast Guard Navik GD Updates

Last updated on Jun 26, 2025

-> The Indian Coast Guard Navik GD Application Deadline has been extended. The last date to apply online is 29th June 2025.

-> A total of 260 vacancies have been released through the Coast Guard Enrolled Personnel Test (CGEPT) for the 01/2026 and 02/2026 batch.

-> Candidates can apply online from 11th to 25th June 2025.

-> Candidates who have completed their 10+2 with Maths and Physics are eligible for this post. 

-> Candidates must go through the Indian Coast Guard Navik GD previous year papers.

Exams Tests Super Practice

More Nucleus Questions

Q1.What is the relative charge of a proton and neutron?
Q2.The nucleus of the atom is positive : 
Q3.The difference in mass of a nucleus and its constituent nucleons is called the ____________.
Q4.What is the maximum number of electrons that the third orbit or M-shell can have?
Q5.The energy released during the fission of U-235 into Barium and Krypton is about 200 MeV. This energy is equivalent to a mass defect ___________ amu (approximately)
Q6.Heavy stable nucle have more neutrons than protons. This is because of the fact that
Q7.The gravitational force between a H-atom and another particle of mass m will be given by Newton’s law: F = \(G \frac{M.m}{r^2}\) where r is in km and
Q8.The binding energy of a H-atom, considering an electron moving around a fixed nuclei (proton), is \(\rm B = -\frac{me^4}{8n^2\varepsilon^2_0h^2}\). (m = electron mass). If one decides to work in a frame of reference where the electron is at rest, the proton would be moving arround it. By similar arguments, the binding energy would be \(\rm B = -\frac{Me^4}{8n^2\varepsilon^2_0h^2}\) (M = proton mass) This last expression is not correct because
Q9.Packing fraction and binding energy both decide the stability. Which of the following statements supports it? 
Q10.A nucleus has an atomic mass number 64. Considering the nucleus as a liquid drop, its radius will be close to (R0 = 1.2 fm):

More Nuclear Physics Questions

Q1.Match List – I with List – II. LIST - I LIST - II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d) Source of X-rays (iv) Vibration of atoms and molecules – (v) LASER – (vi) RC circuit Choose the correct answer from the options given below:
Q2.A radioactive substance is being produced at a constant rate of 10 nuclei/s. The decay constant of the substance is 1/2 s–1. After what time the number of radioactive nuclei will become 10? Initially there are no nuclei present. 
Q3.Which of the following nuclear fragments corresponding to nuclear fission between neutron \((^1_0n)\) and uranium isotope \((^{235}_{92}U)\) is correct:
Q4.Which of the following statements is correct concerning the below reactions?  (i) \(\rm ^1_0n+^{235}_{92}U\rightarrow^{236}_{92}U\rightarrow^{133}_{51}Sb+^{99}_{41}Nb+4^1_0n+Q\) (ii) \(\rm ^1_0n+^{235}_{92}U \rightarrow ^{140}_{54}Xe+^{94}_{38}Sr+2^1_0n+Q\)
Q5.When the masses of an electron, proton, and neutron are me, mp, and mn, respectively, then the nuclear mass of an atom ZXA is _____.
Q6.A radioactive nucleus emits 3 alpha particles and 2 positrons. For the resultant nucleus, the ratio of neutrons to protons is (consider the initial nucleus to have atomic number Z and atomic mass A): 
Q7.The source of energy in stars is: 
Q8.Isotopes have the same number of: 
Q9.The half life of a radioactive substance is 10 years and its initial mass is 1 g. The remaining amount after 20 years is ________. 
Q10.Which of the following is / are used as moderator (s) in nuclear reactors ?
Suggested Test Series
View All >
General Knowledge for All Defence Exams
317 Total Tests with 4 Free Tests
Start Free Test
ICG Navik GD (01/2026 - 02/2026) Mock Test Series
252 Total Tests with   2 Free Tests
Start Free Test

Indian Coast Guard Navik GD Important Links

Admit CardEligibility CriteriaSalary & Job ProfileSyllabus and Exam PatternCut OffExam Analysis

More Physics Questions

Q1.What is the region around a magnet where the magnetic force is experienced known as?
Q2.What is the angle that is formed between the incident ray and the normal line called?
Q3.If the force acting on the body is zero, then its momentum is -
Q4.A bat emits ultrasonic sound of frequency 1000 kHz in air. If the sound gets reflected from a water surface, the wavelength of the reflected sound will be _______. (Speed of sound in air is 340 ms-1)
Q5.What is the SI unit of current?
Q6.Torque acting on electric dipole moment \(\overrightarrow{P}\) placed in uniform electric field \(\overrightarrow{E}\) is 
Q7.Demodulation is essential feature of a
Q8. If the particles are moving with same velocity, then maximum de-Broglie wavelength is for
Q9.Image formed by an objective of a compound microscope is
Q10.Which of the following has smallest wavelength
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
support@testbook.com
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Hot Links： teen patti glory teen patti go teen patti gold new version teen patti flush teen patti master plus