IIT Jee Problem: Two gas argon atomic radius 0.07nm atomic weight 40, and xenon atomic radius 0.1nm

Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to :

Which has a larger atomic radius : Al or Ga?

In group 1 the atomic radius of sodium is greater than the atomic radius of lithium. Give reason.

A mole of any substance contains 6.023 xx 10^(23) particles. The particles may be atom, molecule ions, electron, proton or neutron. One mole of atom is equal to 1 gm -atom which is equal to atomic weight of atom. 1 gm molecule of any gas is 1 mole of gas whose volume is 22.4 litre at N.T.P. Mass of 1 atom of an element X_(2) is 6.64 xx 10^(-23)gm . Molecular weight of X_(2) is

In Bohr.s model of hydrogen atom, radius of the first orbit of an electron is r_(0) . Then, radius of the third orbit is:

The specific heat of gas is found to be 0.075 calories at constant volume and its formula weight is 40. The atomicity of the gas would be

The weight of 350 ml a diatomic gas at 0^(@)C and 2atm pressure is 1 gm.The weight of one atom is :-

If the diameter of a carbon atom is 0.15 nm , calculate the number of carbon atom which can be placed side by side in a straight line length of scale of length 20 cm long.

5.6 litre of the gas have 1 g weight at STP Then atomic weight of the gas is _________.

Metallic magensium has a hexagoanl close-packed structure and a density of 1.74 g //cm^(3) . Assume magnesium atoms to be sphere of radius r. 74.1 % of the space is occupied by atoms. Calculate the volume of each atom and the atomic radius r.(Mg = 24.31)