The atomic radius of hydrogen atom is:A. 25pmB. 30pmC. 53pmD. 43pm

To determine the atomic radius of a hydrogen atom, we can look at the general values commonly accepted in chemistry. The atomic radius refers to the size of an atom, measured from the nucleus to the outermost electron cloud.

For hydrogen, the atomic radius is approximately 53 picometers (pm). Here’s a breakdown of how we arrive at that value:

Understanding Atomic Radius: Atomic radius can vary depending on whether we are considering the covalent radius, van der Waals radius, or metallic radius. For hydrogen, the most relevant is the covalent radius.

Hydrogen's Position in the Periodic Table: Hydrogen is the first element in the periodic table, consisting of one proton and one electron. Its small size is due to having only one electron in its outer shell.

Commonly Accepted Values:

The covalent radius of hydrogen is typically around 37 pm when measured in a covalent bond with another hydrogen atom, but when considering the distance to the outermost electron in its atomic form, it is approximately 53 pm.
Conclusion
The correct answer to the question is:

C. 53 pm

This value reflects the size of the hydrogen atom when accounting for the distribution of its electron cloud.