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Chemistry CBSE Live product
Class 9
Structure of the atom
Annual Revision II - Structure of the atom
8.
Rules of electronic distribution
Question:
3
m.
Answer the following question:
Identify the incorrect order of electron filling and state why it is wrong?
i. (\(2, 8, 2\))
ii. (\(1,3\))
iii. (\(2, 8 \))
iv. (\(2, 8, 1\))
(\(2, 8, 1\))
(\(2, 8, 2\))
(\(2, 8 \))
(\(1,3\))
is wrong because the
Electrons fill shells in any order.
M shell can start filling before the L shell is full.
K shell should fill with \(8\) electrons first.
K shell must have 2 electrons before the L shell starts filling
. Therefore the correct electronic configuration is
\(2, 8, 8, 1\)
\(2, 4 \)
\(2, 3\)
\(2,2\)
.
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