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.

Calculate the electrostatic force in hydrogen atom in which the electron and proton are about 5.3*10^-11 metre apart.

The radius of the inner most electron orbit of a hydrogen atom is 5.3xx10^(-11) m. Find out the radii of the n=2 and n= 3 orbits?

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?

Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth = 6 xx 10^24 kg and mass of the Sun = 2 xx 10^30kg . The average distance between the two is 1.5 xx 10^11 m .

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.

The Marina trench is located in the Pacific Ocean, and at one place it is nearly eleven km beneath the surface of water. The water pressure at the bottom of the trench is about 1.1 xx 10^8 Pa. A steel ball of initial volume 0.32 m3 is dropped into the ocean and falls to the bottom of the trench. What is the change in the volume of the ball when it reaches to the bottom?

Calculate the de-Broglie wave length of a Xe atom moving with velocity 2.4xx10^2ms^-1 the mass of Xe atom is 2.2xx10^(-25) kg .

Silver crystallises in fcc lattice. If edge length of the cell is 4.07xx10^-8 cm and density is 1.05 g cm^-3 . Calculate the atomic mass of silver.