<span>he introduced his law of triads. each triad was a group of three elements</span>
SEAgel (Safe Emulsion Agar gel) is one of a class of high-tech foam materials known as aerogels.
Answer:
the mass number decreases by 4 and the atomic number decreases by 2
Animal fibers are fibers from animals and consist mainly of protein. They contain not only silk fiber from silkworms and fur fiber from sheep wool but also collagen fiber extracted from animal skins, chitin from crustaceans, and shellfish like shrimp and chitosan made by deacetylating chitin.
