Short Answer TypeAmong the following pairs of orbitals which orbital will experience the large effective nuclear charge? (i) 2s and 3s (ii) 4d and 4f (iii) 3d and 3p.
The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus ?
Long Answer TypeShort Answer TypeWhen there is a group of empty orbitals with equal energies (2px, 2py, 2pz), why are electrons first alloted singly to different orbitals ?
Electronic configuration of first ten element:
|
Element |
Atomic number (z) |
Electronic configuration |
|
1.Hydrogen (H) |
1 |
1s1 |
|
2.Helium (He) |
2 |
1s2 |
|
3.Lithium (Li) |
3 |
1s2 2s1 |
|
4.Berylium (Be) |
4 |
1s2 2s2 |
|
5.Boron (B) |
5 |
1s2 2s2 2p1 |
|
6. carbon (C) |
6 |
1s2 2s2 2p2 |
|
7.Nitrogen (N) |
7 |
1s2 2s2 2p3 |
|
8.Oxygen (O) |
8 |
1s2 2s2 2p4 |
|
9.Fluorine (F) |
9 |
1s2 2s2 2p5 |
|
10. Neon (Ne) |
10 |
1s2 2s2 2p6 |
Long Answer TypeWrite the electronic configuration of elements from atomic number 11 to atomic number 20. Also name the elements.
Using the Aufbau principle, write the electronic configuration for the ground state of the following atoms:
(i) Boron (Z = 5)
(ii) Neon (Z = 10)
(iii) Al (Z = 13)
(iv) Chlorine (Z = 17)
(v) Calcium (Z = 20).
Short Answer TypeGive the electronic configuration of following ions:
(i) H- (ii) F- (iii) Mg2+ (iv) S2-
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