Methane Simplest alkane; natural gas main component 🧪 Building Blocks PDB source ↓ Drag to rotate · scroll to zoom 3D viewer requires JavaScript. Static renders available below. Structure Formula CH4 Molecular weight 16.043 g/mol Heavy atoms 1 Total atoms 5 Composition C ×1 H ×4 SMILES C ⧉ Copy Class Alkane