Neušľachtilé a ušľachtilé kovy

600px-Aluminium-4.jpg800px-Zinc_fragment_sublimed_and_1cm3_cube.jpgIron_electrolytic_and_1cm3_cube.jpgPotassium-2.jpg
hliník - zinok - železo - draslík -
633px-NatCopper.jpg800px-Gold-crystals.jpg800px-Platinum_crystals.jpgSilver_crystal.jpg
meď - zlato - platina - striebro -