ChemistryFundamental ConceptNCTB রসায়ন অধ্যায় ৩ (পদার্থের গঠন)
Molecule
Bengali: অণু•Pronunciation: মলিকিউল•Symbol: \text{Molecules (e.g. } \text{H}_2, \text{H}_2\text{O})
Standard Definition:
An electrically neutral group of two or more atoms held together by chemical covalent bonds that exists independently.
📐 Mathematical Equation, Units & Dimensions
Defining Mathematical Equation
Standard SI Unit
amu (u)(আণবিক ভর: $u$ (amu))
Dimensional Analysis
CGS Unit
g
📖 Physical Concept & Comprehensive Explanation
Molecules represent chemical combinations of atoms. Homonuclear molecules (like O2) contain identical elemental atoms, while heteronuclear molecules (like H2O) form chemical compounds.
🎯 High-Yield Revision Points
- ✓Molecules exist stably in a free state.
- ✓Held together via covalent chemical bonds.
- ✓Can be decomposed into their constituent atoms.
Use Online Solver for Molecule
Compute step-by-step solutions, verify formulas, and plot interactive diagrams on biggan.me.
❓ Frequently Asked Exam Questions (FAQ)
Common questions in board and competitive entrance examinations
Q1: What is the key difference between an atom and a molecule?
An atom directly participates in reactions but rarely exists free; a molecule exists independently in nature.