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The masses of neutron and proton are 1.0087 and 1.0073 amu respectively. If the neutrons and proton combine to form helium nucleus of mass 4.0015 amu, the binding energy of helium nucleus would be
Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is
If helium and methane are allowed to diffuse out of the container under the similar conditions of temperature and pressure, then the ratio of rate of diffusion of helium to methane is
The r.m.s. velocity of the molecules in the sample of helium is 5/7ththat of the molecules in the sample of hydrogen. If the temperature of the hydrogen sample is 0°C ,then temperature of helium is
Helium has a mass of 4.0015u for its nucleus. It consists of 2 protons and 2 neutrons. If the mass of proton is 1.0073u and the mass of neutron is 1.0087u, what is the mass defect of the helium nucleu
Assertion (A): Helium, Argon and Neon are gaseous at room temperature.Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive
Atomic number of helium is
The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times
Atomic number of sodium is 11 and its atomic mass is 23 and number of protons and neutrons in an atom of sodium is
Atomic number of an atom is Z and its atomic weight is M. Then number of neutrons in the nucleus will be

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