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Explain the Rule According to Which Electrons Are Filled in Various Energy Levels. - Chemistry

Short Note

Explain the rule according to which electrons are filled in various energy levels.

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Solution

  1. 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.
  2. The maximum number of electrons possible in the outermost shell is 8 and that in the penultimate shell is 18.
  3. 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.
Concept: Sub-atomic Particles of Atom - Electrons (E)
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APPEARS IN

Selina Concise Science Chemistry 1 Class 9 ICSE
Chapter 4 Atomic Structure and Chemical Bonding
Exercise 4 (B) | Q 8 | Page 63
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