An atom has a total number of 17 electrons. What will be the distribution of electrons in different shells?
[3 Marks]
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Solution
According to Bohr-Bury scheme, the maximum number of electrons present in a shell is given by the formula 2n2, where ‘n’ is the orbit number.
[1 Mark]
The maximum number of electrons in different shells is as follows:
Shells
Maximum number of electrons
K (n=1)
2
L (n=2)
8
M (n=3)
18
[1 Mark]
Therefore, if an atom has a total number of 17 electrons, then the distribution of electrons will be:
K-shell = 2 electrons
L-shell = 8 electrons
M-shell = 7 electrons
[1 Mark]