Boron is unique trace element Boron (B) is a non-metal element in Group 13 of the Periodic Table. Properties of B are very close to carbon and silicon. This element has one less valence electron than valence orbitals. Due to small size and high ionization energies, boron results in covalent bonding rather than metallic bonding [1]. B is a rare element in the Earth, representing only 0.001%. It is estimated that worldwide commercial borate deposits are 10 million tonnes [2]. In the Earth, B is not present in the elemental form. It is found in the form of borax, boric acid, colemanite, kernite, ulexite and borates [3]. There are two forms for elemental boron, namely amorphous boron, which is a brown powder, and crystalline boron, which is dark grey in color and a semiconductor at room temperature. In elemental form boron reacts with gaseous HF to form a volatile BF3, however it does not react with gaseous HCl, ,and about its effect on health is very limited,.please tell us about boron and human health?

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