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प्रश्न
Explain the rule according to which electrons are filled in various energy levels.
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उत्तर
- The maximum capacity of a shell to accommodate electrons is given by the general formula 2n2, where n is the serial number of a shell.
- The maximum number of electrons possible in the outermost shell is 8 and that in the penultimate shell is 18.
- It is not necessary for an orbit to be completed before another is formed. In fact, a new orbit is formed when the outermost shell attains 8 electrons.
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संबंधित प्रश्न
Fill in the blank of the following statement :
Cathode rays are a beam of fast moving _________.
Which sub-atomic particle was discovered by Chadwick.
If electrons are getting added to en element Y; then
Is Y getting oxidized or reduced?
Choose the correct answer from A, B, C and D:
When a metal atom becomes an ion:
An element X has 2 electrons in its M shell, it forms a bond with an element Y which has 7 electrons in its third orbit.
- Write the formula of the compound formed.
- Which nearest inert gas electronic configuration will element X and Y acquire.
- Show by orbital diagram the formation of the compound between X and Y.
In the formation of (i) oxygen molecule (ii) carbon tetrachloride molecule, state the following:
- Electronic configuration of nearest inert gas attained.
- How many electrons are shared/transferred in bond formation
- Which type of bonds these compounds form?
- Draw their orbital diagrams.
Explain in brief the experimental proof which led to the discovery of –
Electrons
Give a reason why noble gases have a stable electronic configuration.
When an atom gains an electron it has more electrons and thus it carries a positive charge.
Select the INCORRECT statement.
