The average distance of an electron in an atom from its nucleus is of the order of
The nucleus of the atom consists of
From the following masses, the one which is expressed nearest to the milligram is
One would expect proton to have very large
The density of a neclear of an atom is
Assertion : Cathode rays are a stream of Î± -particles.
Reason : They are generated under high pressure and high voltage.
Which of the following statement is true
Which is correct statement about proton
The proton and neutron are collectively called as
Cathode rays are made up of
The nucleus of helium contains
If uncertainty in position and momentum are equal, then uncertainty in velocity is:
Maximum number of electrons in a subshell of an atom is determined by the following:
The total number of atomic orbitals in fourth energy level of an atom is:
The orbital angular momentum of a p-electron is given as:
Ratio of masses of proton and electron is
Number of neutron in C12 is
Splitting of signals is caused by
Maximum number of electrons in a subshell with:
Who discovered that cathode rays are made up of electrons
The nature of anode rays depends upon
What is the ratio of mass of an electron to the mass of a proton
The Heaviest particle is
Which phrase would be incorrect to us
Which one of the following pairs is not correctly matched
Rutherford experiment prove
Penetration power of proton is
Anode rays were discovered by
Cathode rays have
The atomic number of Ni and Cu are 28 and 29 respectively. The electronic configuration (1s)^2 (2s)^2 (2p)^6 (3s)^2 (3p)^6 (3d)^10..
[Ar] (3d)^10, (4s)^1 electronic configuration belongs to
Electron density in the yz plane of 3d(x^2 y^2) orbital is
Impossible orbital among the following is
The stability of ferric ion is due to
Non-directional orbital is
Two electrons occupying the same orbital are distinguished by
The total number of electrons present in all the s orbitals, all the p orbitals and all the d orbitals of cesium ion are respectiv..
Which of the following is not permissible arrangement of electrons in an atom?
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