péng yǐn
意思解释：（Boracic concealed）声音宏大响亮。
一种非金属元素。符号B，原子序5，原子量10.811，原子价3，比重2.34。有结晶体和非结晶体两种。结晶体的硼有光泽，很坚硬，溶于浓硝酸和硫酸;非结晶体的硼是一种绿棕色粉末，不透明，无色无臭。硼能吸收中子，可用来做控制棒，并且是制造…
A kind of metalloid element. Symbolic B, atomic foreword 5, atomic weight 10.811, quantivalence 3, specific gravity 2.34. Crystal having a tie and blame crystallization body two kinds. The boracic luster of crystallization body, very hard, the boron that dissolve is not crystallization body at thick nitric acid and vitriolic; is a kind of green brown powder, opaque, colorless without smelly. Boron can absorb neutron, usable will make control bar, and be make...
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