Question
Download Solution PDFThe number of valence electron in boron is________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct option is 3
Concept:
- Valance Electrons: Valence electron is simply the total number of electrons present in the outermost shell of an atom.
- Valency: Valency is the number of electrons an atom loses, gains or shares with other atoms in order to get a stable configuration.
For example-
Atomic Configuration of Carbon (C ) is ( 6 ) = 2,4
- Valency of Carbon will be 4 as it needs 4 more electrons to get a stable configuration.
- Number of valence electrons in carbon is also four as it's outermost shell contains 4 electrons.
Atomic Configuration of Nitrogen N ( 7 ) = 2,5
Valency of nitrogen is 3 as it needs 3 more electrons to complete its octet but number of valence electrons in nitrogen is 5.
Explanation:
The element with the electron configuration (2, 3) is boron as it has the atomic number 5.
The last shell contains 3 electrons.
- It is placed in Group 13 of the periodic table along with boron, Gallium, Indium and Thallium.
- The Group 13 in the Periodic Table is known as the Boron Group and all the elements in this group has three electrons in the valence layers.
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