1.

Calculate the reduced mass of hydrogen molecule (H).Atomic mass of hydrogen is 1.7 x 10-27 Kg.

Answer»

ke2/r2= mv2/r

Where ke2/r2is the Coulomb's force and mv2/r is thecentripetalforce of the electron around the nucleus

you know from Bohr's postulate

mvr = nh/2π

Combine the two equations. What is the value of the radius of the first orbit ?

r=

Plank's constant h= 6.624 10-34Js

electron mass me= 9.11 10-31Kg

electron charge e= -1.6 10-19C

Coulomb's constant k=8.99 109m2N/C2

ke2/r2= mv2/r

3rdBohr's postulate

mvr = nh/2Π

v = nh/2Πmr

ke2/r2= mn2h2/r4Πm2r2

r = n2h2/k4Π2me2

r = 0.53 Angstrom



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