Natural element
Natural elements refer to substances that occur naturally and are not manufactured or synthetically produced by humans.
2HeHeliumcolorless gas, exhibiting a gray, cloudy glow 6CCarbonblack, metallic-looking (graphite); clear (diamond) 8OOxygencolorless (gas); pale blue (liquid and solid) 9FFluorinevery pale yellow (gas); bright yellow (liquid); alpha is opaque, beta is transparent (solid) 10NeNeoncolorless gas exhibiting an orange-red glow when placed in an electric field 14SiSiliconcrystalline, reflective with bluish-tinged faces 15PPhosphoruswhite, red and violet are waxy, black is metallic-looking 18ArArgoncolorless gas exhibiting a lilac/violet glow when placed in an electric field 19KPotassiumsilvery white, faint bluish-purple hue when exposed to air 26FeIronlustrous metallic with a grayish tinge 34SeSeleniumgrey metallic-looking, red, and vitreous black allotropes 36KrKryptoncolorless gas, exhibiting a whitish glow in an electric field 50SnTinsilvery-white (beta); gray (alpha) 52TeTelluriumsilvery lustrous gray (crystalline); brown-black powder (amorphous) 53IIodinelustrous metallic gray (solid); black/violet (liquid); violet (gas) 54XeXenoncolorless gas, exhibiting a blue glow when placed in an electric field 63EuEuropiumsilvery white, with a pale yellow tint; but rarely seen without oxide discoloration 89AcActiniumsilvery-white, glowing with an eerie blue light; sometimes with a golden cast 92UUraniumsilvery gray metallic; corrodes to a spalling black oxide coat in air