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Can there be an atomic nucleus where there are more protons than neutrons?

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3

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Well, the question says it all.
As far as I know , number of protons is less that or equal to the number of neutrons in any atomic nuclei.
But is their any possibility that there exists a nucleus where the number of protons exceeds number of neutrons (apart of course, from the trivial case of Hydrogen)?

atomic-physics

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edited 10 hours ago

lurscher

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overkilloverkill

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• 
  
  
  

  
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  $begingroup$
  "As far as I know , number of protons is less that or equal to the number of neutrons in any atomic nuclei." - I don't understand how you came to this belief. The very first element in the periodic table forms atoms with one proton and no neutron...
  $endgroup$
  – ACuriousMind♦
  11 hours ago
  

  
  
  
  


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  Did you check the periodic table? Some prior research is required.
  $endgroup$
  – my2cts
  11 hours ago
  

  
  
  
  


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  How about a neutron star? It isn't an atomic nucleus, but it is more neutrons than protons.
  $endgroup$
  – mmesser314
  10 hours ago
  

  
  
  
  

add a comment
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3

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Well, the question says it all.
As far as I know , number of protons is less that or equal to the number of neutrons in any atomic nuclei.
But is their any possibility that there exists a nucleus where the number of protons exceeds number of neutrons (apart of course, from the trivial case of Hydrogen)?

atomic-physics

share|cite|improve this question

edited 10 hours ago

lurscher

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asked 11 hours ago

overkilloverkill

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$endgroup$

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  "As far as I know , number of protons is less that or equal to the number of neutrons in any atomic nuclei." - I don't understand how you came to this belief. The very first element in the periodic table forms atoms with one proton and no neutron...
  $endgroup$
  – ACuriousMind♦
  11 hours ago
  

  
  
  
  


• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  Did you check the periodic table? Some prior research is required.
  $endgroup$
  – my2cts
  11 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  How about a neutron star? It isn't an atomic nucleus, but it is more neutrons than protons.
  $endgroup$
  – mmesser314
  10 hours ago
  

  
  
  
  

add a comment
 | 

$begingroup$

Well, the question says it all.
As far as I know , number of protons is less that or equal to the number of neutrons in any atomic nuclei.
But is their any possibility that there exists a nucleus where the number of protons exceeds number of neutrons (apart of course, from the trivial case of Hydrogen)?

atomic-physics

share|cite|improve this question

edited 10 hours ago

lurscher

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overkilloverkill

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edited 10 hours ago

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edited 10 hours ago

lurscher

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edited 10 hours ago

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2 Answers
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8

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According to Wikipedia:

Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons.

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answered 10 hours ago

tparkertparker

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• 
  
  
  

  
  

  
  
  
  
  
  

  
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  The OP didn't ask about stable nuclei.
  $endgroup$
  – Ben Crowell
  11 mins ago
  

  
  
  
  

add a comment
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-3

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Nothing apart from Hydrogen. Anything bigger with more protons than neutron would have too much inter-nuclear repulsion to stay together as a single unit. The strong nuclear force which holds the nucleons together would be overwhelmed by the electrostatic forces between the protons.

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answered 10 hours ago

SamSam

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$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
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  Helium-3 is stable and has two protons and one neutron.
  $endgroup$
  – tparker
  10 hours ago
  

  
  
  
  

add a comment
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8

$begingroup$

According to Wikipedia:

Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons.

share|cite|improve this answer

answered 10 hours ago

tparkertparker

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$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The OP didn't ask about stable nuclei.
  $endgroup$
  – Ben Crowell
  11 mins ago
  

  
  
  
  

add a comment
 | 

8

$begingroup$

According to Wikipedia:

Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons.

share|cite|improve this answer

answered 10 hours ago

tparkertparker

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$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  The OP didn't ask about stable nuclei.
  $endgroup$
  – Ben Crowell
  11 mins ago
  

  
  
  
  

add a comment
 | 

$begingroup$

According to Wikipedia:

Other than protium (ordinary hydrogen), helium-3 is the only stable isotope of any element with more protons than neutrons.

share|cite|improve this answer

answered 10 hours ago

tparkertparker

26.2k11 gold badge5555 silver badges138138 bronze badges

$endgroup$

share|cite|improve this answer

answered 10 hours ago

tparkertparker

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answered 10 hours ago

tparkertparker

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answered 10 hours ago

tparkertparker

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-3

$begingroup$

Nothing apart from Hydrogen. Anything bigger with more protons than neutron would have too much inter-nuclear repulsion to stay together as a single unit. The strong nuclear force which holds the nucleons together would be overwhelmed by the electrostatic forces between the protons.

share|cite|improve this answer

answered 10 hours ago

SamSam

39766 bronze badges

$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Helium-3 is stable and has two protons and one neutron.
  $endgroup$
  – tparker
  10 hours ago
  

  
  
  
  

add a comment
 | 

-3

$begingroup$

Nothing apart from Hydrogen. Anything bigger with more protons than neutron would have too much inter-nuclear repulsion to stay together as a single unit. The strong nuclear force which holds the nucleons together would be overwhelmed by the electrostatic forces between the protons.

share|cite|improve this answer

answered 10 hours ago

SamSam

39766 bronze badges

$endgroup$

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Helium-3 is stable and has two protons and one neutron.
  $endgroup$
  – tparker
  10 hours ago
  

  
  
  
  

add a comment
 | 

$begingroup$

Nothing apart from Hydrogen. Anything bigger with more protons than neutron would have too much inter-nuclear repulsion to stay together as a single unit. The strong nuclear force which holds the nucleons together would be overwhelmed by the electrostatic forces between the protons.

share|cite|improve this answer

answered 10 hours ago

SamSam

39766 bronze badges

$endgroup$

share|cite|improve this answer

answered 10 hours ago

SamSam

39766 bronze badges

answered 10 hours ago

SamSam

39766 bronze badges

answered 10 hours ago

SamSam

39766 bronze badges