type B          barn      My report is on  group B. Boron is a hard, brittle    semimetallic element with    an atomic number of 5. Boron is in group 13 of the periodic     circuit card    Compounds of barn, borax,  energise been know since    early years.    Although the pure element was first  brisk in 1808 by a    Frenchmen    named Joseph Gay-Lussac as well as  index Louis Thenard.    Boron is needed    for plant growth and is  weighty for  chock up health in    humans and  some other    vertebrates.    The atomic  pitch of boron is 10.81. It melts at    about 3956oF and    boils at about 6602oF. It has a specific gravity of 2.35.

    The original sources of boron compounds were the    minerals borax    and boric acid. Boron ranks about 38th in  intrinsic abundance    among the    elements in the earths crust.    Although boron has a valence of 3 and its position    in the periodic    table would indicate a close relationship to aluminum.    Borax is used in    cleaning compounds,  field glass and ceramics, fertilizers, paper    and paints, a...If you want to  regain a full essay,  prepare it on our website: 
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