Explanation of Wood Atoms

Wood doesn't consist of "wood atoms" as a distinct element; it's primarily made of molecules like cellulose, hemicellulose, and lignin, built from carbon (C), hydrogen (H), and oxygen (O) atoms.

Main Components

Wood is a natural composite where cellulose (40-50%) forms strong chains of glucose units, each glucose containing 6 C, 12 H, and 6 O atoms linked by bonds. Hemicellulose (20-30%) adds branched sugars for flexibility, while lignin (20-30%) provides rigidity through aromatic rings of C, H, and O.

Atomic Makeup

By mass, dry wood averages about 50% C, 42% O (from oxygen in sugars and polymers), 6% H, and traces of nitrogen or minerals. These atoms bond covalently in long polymers, not as free elements, giving wood its strength and buoyancy.

Microstructure

At the atomic level, cellulose chains bundle into microfibrils coated by hemicellulose and lignin, forming wood cells with layered orientations for durability. Extractives like resins contribute minor atoms affecting color and decay resistance.