The unit of length convenient on.the atomic scale js known as an angstrom and is denoted byA: `1overset(0)A = I06(-10)`m. The size of a hydrogen atom is about 0.5 A what is the total atomic volume in `m^3` of a mole of hydrogen atoms?

The Bohr’s radius of first orbit of hydrogen atom is 0.053 nm. What is the radius of the second orbit?

If the radius of the innermost orbit of hydrogen atom is 5.3x10^(-11) m what is the radius of the third orbit?

The unit of length convenient on the nuclear scale is a fermi : 1 f = 10^(-15) m. Nuclear sizes obey roughly the following empirical relation : r = r_0A^(1/3) where r is the radius of the nucleus, A its mass number, and r_0 is a constant equal to about, 1.2 f. Show that the rule implies that nuclear mass density is nearly constant for different nuclei. Estimate the mass density of sodium nucleus. Compare it with the average mass density of a sodium atom obtained in Exercise. 2.27.

One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What 'is the ratio of molar volume to the atomic volume of a mole of hydrogen?

In the HCI molecule, the separation between the nuclei of the two atoms is about 1.27 A (1 A = 10-^10 m) . Find the approximate location of the CM of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus.

What is the de-Broglie wavelength of an electron in the Bohr's orbit of radius 0.51 overset(@)A in hydrogen atom?