there are loads!
Now are known 118 chemical elements.
Silk is animal protein, from the silk worm.
75 dissolved chemical elements
Well it's a protein therefore there are 5 chemical elements within silk.These elements being:CarbonNitrogenOxygenHydrogenSulfur
Silk is not a compound; silk is a mixture of natural proteins.
Now (22.08.2012) 118 chemical elements are known.
False; practically all the chemical elements have many uses.
The chemical formula is established after chemical analysis.
Today (July 2013) 118 chemical elements are known.
It's 118 chemical elements in the periodic table.
Silk
Now (2013) are considered as natural chemical elements 97 elements (including berkelium).