What does He-Like or Ni-Like mean?

  • Thread starter Gobil
  • Start date
  • Tags
    Mean
In summary, the conversation discusses the meaning of the terms "He-like" and "Ni-like" in relation to ionization and electron configuration. It is concluded that "He-like" refers to an ion with a nucleus and 2 electrons, similar to helium, while "Ni-like" means an ion with the same number of electrons as a neutral nickel atom. The posts also mention the importance of a filled outer shell in determining if an ion is considered "He-like."
  • #1
Gobil
59
0
Hi all,

Just wondering what does this mean, I understand it is related to a certain state of ionisation, but I would like to know why they are 'like' other atoms?

thanks!

Gobil
 
Physics news on Phys.org
  • #2
Welcome to PF.

He-like means the ion is stripped of all but 2 electrons. So it has a nucleus and 2 electrons, just like helium.

Ni-like would mean an ion with the same number of electrons as a neutral nickel atom.
 
  • #3
  • #4
thanks folks!

The posts are conflicting though, if an ion (regardless of what it is) is stripped to a single electron, we can regard this as being H-like right? In this case does the nucleus remain the same?

Bob S says that an un-ionised Ni atom can be regarded as He-like, because it has two outermost e's. This seems a bit fuzzy, since then there would be a lot more atoms that are He-like, hence rendering the comparison somewhat useless.
 
  • #5
The nucleus remains the same.
Also, I would have thought that the word "He-like" would be reserved for an ion which not only has 2 electrons, but also that those electrons form a filled outer shell. I.e Ni would not be He like?
This could of course only happens if the system is ionized to the point that only the 1s electrons remain and all other electrons in higher shells have been stripped away.
 

1. What is the difference between He-Like and Ni-Like?

He-Like and Ni-Like refer to different ionization states of an atom. He-Like is when an atom has one electron left in its outermost shell, while Ni-Like is when an atom has two electrons left in its outermost shell.

2. How are He-Like and Ni-Like ions formed?

He-Like and Ni-Like ions are formed when an atom gains or loses electrons, resulting in a different number of electrons in the outermost shell. This can happen through various processes such as collisions with other particles or exposure to high energy radiation.

3. What are the characteristics of He-Like and Ni-Like ions?

He-Like and Ni-Like ions have different energy levels and spectral lines due to the difference in the number of electrons in the outermost shell. They also have different ionization energies and reactivity towards other atoms.

4. How are He-Like and Ni-Like ions used in scientific research?

He-Like and Ni-Like ions are used in various fields of science, such as astrophysics, plasma physics, and nuclear fusion research. They are also used in spectroscopy to study the energy levels and properties of atoms.

5. Can He-Like and Ni-Like ions exist in nature?

Yes, He-Like and Ni-Like ions can exist in nature. They are commonly found in high-temperature environments such as stars, supernovae, and high-energy plasmas. They can also be produced in laboratories using specialized equipment.

Similar threads

  • High Energy, Nuclear, Particle Physics
Replies
1
Views
430
  • Atomic and Condensed Matter
Replies
1
Views
1K
  • Atomic and Condensed Matter
Replies
8
Views
2K
  • Atomic and Condensed Matter
Replies
1
Views
2K
  • Atomic and Condensed Matter
Replies
13
Views
2K
  • Atomic and Condensed Matter
Replies
0
Views
606
  • Atomic and Condensed Matter
Replies
0
Views
940
  • Atomic and Condensed Matter
Replies
1
Views
517
  • Advanced Physics Homework Help
Replies
3
Views
817
  • Atomic and Condensed Matter
Replies
18
Views
1K
Back
Top