Question

Bond length is the distance between the centers of two bonded atoms. on the potential energy curve, the bond length is the internuclear distance between the two atoms when the potential energy of the system reaches its lowest value. given that the atomic radii of h and cl are 25.0 cm and 100. pm , respectively, predict the bond length of the hcl molecule.

Answer 1

The lowest energy system occurs when the bond is the sum of the 2 atoms' radii. Therefore the length of the H-Cl bond is approximately:
25.0 pm + 100 pm = 125 pm
Hope this helps!

Answer 2

Answer:Hence, the bond length in HCl is 125 pm.

Explanation:

Bond length : It is an average distance between the nuclei of two bonded atoms in a molecule.

Also given that bond length is the distance between the centers of two bonded atoms. on the potential energy curve, the bond length is the inter-nuclear distance between the two atoms when the potential energy of the system reaches its lowest value. Beyond this if atoms come closer to each other then their will be repulsion between them.

So, the bond length between the Hydrogen and Chlorine atom in HCl molecule is :

$Bond length=radius _{hydrogen}+radius_{chlorine}=25pm+100pm=125pm$

Hence, the bond length in HCl is 125 pm.