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Question
Arrange the following elements in the increasing order of their valence electrons.
Arrange the following elements in the increasing order of their valence electrons.
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Solution
A valence electron is an outer shell electron that is associated with an atom. The electronic configration of the elements given above are as follows:
Element
Atomic number
Electronic configuration
Number of valence electrons
Hydrogen
1
(1)
1
Boron
5
(2,3)
3
Carbon
6
(2,4)
4
Oxygen
8
(2,6)
6
Neon
10
(2,8)
8
So, the correct order is:
Hydrogen < Boron < Carbon < Oxygen < Neon
| Element | Atomic number | Electronic configuration | Number of valence electrons |
| Hydrogen | 1 | (1) | 1 |
| Boron | 5 | (2,3) | 3 |
| Carbon | 6 | (2,4) | 4 |
| Oxygen | 8 | (2,6) | 6 |
| Neon | 10 | (2,8) | 8 |
So, the correct order is:
Hydrogen < Boron < Carbon < Oxygen < Neon
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