ChemistryFundamental ConceptNCTB রসায়ন অধ্যায় ৫ (রাসায়নিক বন্ধন)
Valency
Bengali: যোজ্যতা•Pronunciation: ভ্যালেন্সি•Symbol: v
Standard Definition:
A measure of the combining capacity of an atom with other atoms when forming chemical compounds.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
Dimensionless integer(এককবিহীন পূর্ণসংখ্যা)
Dimensional Analysis
CGS Unit
None
📖 Physical Concept & Comprehensive Explanation
Valency reflects an atom's combining capacity to satisfy the octet or duet rule. Elements achieve chemical stability by losing, gaining, or sharing outer-shell valence electrons. Transition metals frequently exhibit variable valency.
🎯 High-Yield Revision Points
- ✓Valency is a positive integer without charge signs.
- ✓Noble gases have zero valency.
- ✓Transition metals exhibit variable valencies (e.g., Fe: 2 and 3).
Use Online Solver for Valency
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❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: What is the difference between valency and oxidation state?
Valency is a chargeless combining capacity integer, while oxidation state carries formal positive, negative, or fractional charge signs.