Does anyone know the ionic radius of hydride(anion of hydrogen)?

In summary, the internuclear distance of hydride varies depending on the compound it is found in, but it is typically around 1.3 angstroms. It is not significantly different from the radius of hydrogen and can be compared to an oxide ion. The issue of where the hydride stops and the counter ion starts is also a factor. The nationality of the forum users is not relevant to this topic.
  • #1
edwin2b
7
0
I come from Hong Kong and want to know the ans. THX very much!

Also curious to know, which nationality will browse this forum most?
 
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  • #2
In which compound? As I'm sure you aware, you cannot really get get hydride by itself, so the issue may be where the hydride stops and the counter ion starts.
 
  • #3
In water the internuclear distance from the hydrogen ion to the oxygen atom is .965 angstroms. in Hydrogen sulfide it is 1.34 angstroms to the sulfur. In H2Se it is 1.47 and in H2Te it is 1.67.
 
  • #4
schrodie said:
In water the internuclear distance from the hydrogen ion to the oxygen atom is .965 angstroms. in Hydrogen sulfide it is 1.34 angstroms to the sulfur. In H2Se it is 1.47 and in H2Te it is 1.67.

These are not hydride (H-).
 
  • #5
The radius of hydride is practically identical to hydrogen. The second electron is in the same orbital.

The very slight change in radius due to the electron-electron interactions isn't going to be important. Ionic radii are a crude measure in any case.
 
  • #6
A quick analysis of the alkali metal hydride crystal structures (and using the Shannon-Prewitt ionic radii for the metals) gives an average 1.3 angstrom (130 pm) radius for H-. Roughly about the same size as an oxide ion.
 

1. What is an ionic radius?

The ionic radius is the measure of the size of an ion, which is the electrically charged form of an atom. It is typically measured in picometers (pm) or angstroms (Å).

2. How is the ionic radius determined?

The ionic radius is determined by measuring the distance between the nuclei of two ions that are bonded together and dividing it in half. It is important to note that the ionic radius can vary depending on the type of bond and the type of ion.

3. What is the ionic radius of hydride?

The ionic radius of hydride, which is the anion of hydrogen, is approximately 1.3 Å. This value may vary slightly depending on the specific compound or bond.

4. How does the ionic radius of hydride compare to other ions?

The ionic radius of hydride is smaller than most other ions due to its high charge density. This means that it has a greater number of protons compared to its size, making it more compact.

5. Why is knowing the ionic radius of hydride important?

Knowing the ionic radius of hydride is important for understanding its chemical properties and how it interacts with other ions. It can also be used in calculations and experiments to determine the behavior of hydride in various chemical reactions.

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