Advertisements
Advertisements
प्रश्न
Explain the rule with example according to which electrons are filled in various energy levels
Advertisements
उत्तर
The maximum number of electrons that can be present in any shell or orbit of an atom is given by the formula 2n2, where n is the serial number of the shell.
Therefore:
K shell, n = 1, no. of electrons = 2 x 12 = 2
L shell, n = 2, no. of electrons = 2 x 22 = 8
M shell, n = 3, no. of electrons = 2 x 32 = 18
N shell, n = 4, no. of electrons = 2 x 42= 32
Electrons are not accommodated in a given shell, unless the inner shells are filled.
That is, the shells are filled in a stepwise manner
APPEARS IN
संबंधित प्रश्न
Multiple Choice Questions
number of valence electrons present in magnesium is
Define the term Atomic number.
FILL IN THE BLANK
The γ-rays are............................ radiations, like light.
ANSWER IN DETAIL
Write a note on valence shell.
Name the negatively charged particle present in the atoms of all the elements.
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
State the location of electrons, protons and neutrons in an atom.
State its one drawback of Rutherford’s atomic model.
Define the term Valence shell.
With reference to the discovery of the structure of an atom, explain in brief – William Crookes experiment for the discovery of cathode rays, followed by – J.J. Thomsons experiment pertaining to the constituents of the cathode rays. State which sub-atomic particle was discovered from his experiment.
