Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

Unstability of nucleus
Asked by | 05 Mar, 2008, 09:01: AM
answered-by-expert Expert Answer

Nuclei like to maintain a specific ratio of neutrons-to-protons. If this ratio is not achieved, then the system will experience some level of instability. Generally, the first twenty elements prefer a ratio of one-to-one. Elements beyond the first twenty will prefer more neutrons than protons. Consequently, the ratio will be a number that is greater than one. The preferred value for that ratio is not well-defined.

Elements with atomic number more than 82 have neutron to proton ratio of more than one and hence get unstable.

 

Regards

Team

TopperLearningSystem

Answered by | 07 Dec, 2017, 06:24: PM
Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
The number of moles in an elemental sample is just the ratio of the mass m to atomic mass 4. n= A The number of protons N, in an elemental sample is Z (atomic number) times the number of moles of Avogadro's number NA N=ZnN P A Copper has an atomic mass of 63.5 g/mole and 29 protons per atom. If such an atom were neutral, then it would have as many protons as electrons. If you remove electrons from a neutral state, then you get a net positive charge. Given a 54 gram ball of copper with a net charge of 2.2 µC, what fraction of the copper's electrons have been removed?
Asked by dasrituparna1999 | 12 Apr, 2024, 09:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
consider a hypothesis H-like atom, the wavelength in Amstrong for the spectral lines for the transition from n=p to n=1 is given as  wavelength =1500p^2/p^2 -1 where p>1 find the minimum and maximum wavelength
Asked by Akshatkuma2004 | 04 Jul, 2021, 04:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
A loop of irregular shape carrying current is located in an external magnetic field. If the wire is flexible, why does it change to a circular shape?
Asked by kbsahilsid18 | 13 Aug, 2020, 10:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why emission spectra are seen in only those gases which have low density or low number of collisions?
Asked by rsrakesh932 | 12 Jun, 2020, 04:38: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
At stopping potential does the work function becomes zero?
Asked by jabreshwar1008 | 28 Dec, 2019, 08:59: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
How to obtain bright fringes by young double slit experiment. ??
Asked by yadavnitish688 | 14 Dec, 2019, 06:04: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What is the radius of an electron?
Asked by sidiz.shrestha07 | 26 May, 2019, 06:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
THE VALUE OF GROUND  STATE ENERGY OF HYDROGEN ATOM IS -13.6eV WHAT DOES THE NEGATIVE SIGN SIGNIFY AND HOW MUCH ENERGY IS REQUIRED TO TAKE AN ELECTRON IN THIS ATOM FROM GROUND STATE TO THE FIRST EXCITED STATE ?
Asked by pardeepkumar2281 | 28 Feb, 2019, 07:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What is the order of velocity of an electron in H atom in ground state ?
Asked by pradeepjsme | 30 Jan, 2019, 03:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What is the order of velocity of an electron in a H-atom in ground state?
Asked by pradeepjsme | 30 Jan, 2019, 03:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×