Question
Download Solution PDFThe number of valence electrons of P and Si are ______ respectively.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFMistake Points
The question is asking about the number of valence electrons, and not about the valency of the atom. Since a valence electron is the number of outer shell electrons that is associated with an atom, Phosphorous will have 5, and Silicon will have 4 valence electrons.
The correct answer is 5 and 4.
Explanation:
- A valence electron is an outer shell electron that is associated with an atom.
- These electrons can participate in the formation of a chemical bond.
Key Points
- Silicon has two electrons in its first shell, eight electrons in the second shell, and four (4) electrons in the third shell.
- Since the electrons in the third shell are the outermost electrons, silicon has four valence electrons.
- Phosphorus having an atomic number 15 is a pentavalent element, which means it has 5 valence electrons in its outermost shell.
Last updated on May 29, 2025
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