PERIODIC TABLE AND ELECTRONIC CONFIGURATION
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What is the electronic configuration of sodium and argon 1.1
How many electrons are present in the M shell of argon which is the outermost shell?
How many more electrons can be accommodated in the M shell?
10 more electrons
What will be the number of subshells in the shells M and N?
M = 3
N = 4
See the subshells present in each shell 1.2
Which subshell is common to all shell?
Fill in the table 1.3
Write the subshells in the increasing order of their energy
What is the atomic number of the lithium?
Complete the table 1.5, writing the subshell electronic configuration of the given elements
Write the subshell electronic configuration of potassium (19K)
1s2 2s2 2p6 3s2 3p6 4s1
What about its shell wise electronic configuration?
See the graph in Tb (fig 1.2)
Compare the energies of 1s and 2s subshells. Which has lower energy?
1s has lower energy
Of the 3s and 3p subshells, which has higher energy? What about the 3d and 4s?
3p has higher energy than 3s, 3d has higher energy than 4s.
The electronic configuration of scandium (21Sc) is 2,8,9,2. How can we write its subshell electronic configuration?
1s2 2s2 2p6 3s2 3p6 4s2 3d1
Write the electronic configuration of 22Ti and 23V.
22Ti – 1s2 2s2 2p6 3s2 3p6 4s2 3d2
23V – 1s2 2s2 2p6 3s2 3p6 4s2 3d3
Complete the table 1.6
Write the subshell electronic configuration of 24Cr.
1s2 2s2 2p6 3s2 3p6 3d4 4s2
Stable electronic configuration of Cr – 1s2 2s2 2p6 3s2 3p6 3d5 4s1
Correct electronic configuration of 29Cu is
1s2 2s2 2p6 3s2 3p6 3d10 4s1
If the subshell wise electronic configuration of an atom is 1s2 2s2 2p6 3s2 , find answers to the following :
How many shells are present in this atom?
Which are the subshells of each shell?