640x480pxlaboratory glassware icon, chemical symbol logo, science communication emblem, hydrogen peroxide illustration, molecular structure visualization, chemistry education graphic, experimental tools art
1024x1024pxHydrogen chemical element, Periodic table symbol H, Hydrogen atomic number 1, Hydrogen molecular structure, Chemistry infographic design, Scientific element chart, Elemental properties diagram
777x600pxLewis structure of ammonia, ammonia molecular geometry, nitrogen lone pair, chemical bond in NH3, molecular symmetry analysis, hydrogen bonding in molecules, 3D molecular visualization
