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How to find elements  configuration 
Asked by sunilrayantonysinai1356 | 19 Jun, 2019, 09:47: PM
answered-by-expert Expert Answer
Distribution of electrons:
  • According to Bohr’s model, electrons occupy certain stable orbits or shells. Each shell has definite energy.
  • These orbits or shells are represented by the letters K, L, M, N,... or  the numbers 1, 2, 3, 4,…
  • The maximum number of electrons present in the shell is given by the formula (2n2), where n is the orbit number or shell number.
  • The first orbits or K shell will have 2 × 12 = 2 electrons.
  • The second shell will have 2 × 22 = 8 electrons
  • The third shell will have 2 × 32 = 18 electrons
  • The fourth shell will have 2 × 42 = 32 electrons and so on.
Example:
 
Electronic configuration of carbon (6) is 2,4
 
K     L
2     4
 
Electronic configuration of oxygen(8) is 2,6
 
K     L
 
2     6
 
Answered by Varsha | 20 Jun, 2019, 10:42: AM

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