Essay On Zinc

359 Words 2 Pages
Zinc is the member of the first row transition series of elements, consisting of Sc, Ti, Cr, Mn, Co, Ni, Cu, Zn, Cd and Hg. All these elements belong to group 12 of periodic table. Zinc has an atomic number 30, an atomic mass of 65 and one main oxidation state (+2). Zinc has five nature isotopes . Zinc is the 24th most abundant element in the earth’s crust. Its properties is very similar to Cd.Zinc is very useful in biological systems. Zinc also is involved in many biochemical processes that support life and required for a host of physiological. it is an one of the most essential plant micronutrient and it play a major role in growth and metabolism, mainly in enzyme activation, metabolism of carbohydrates, lipids, nucleic acids, gene expression and regulation, protein synthesis and reproductive development of plants (Marschner, 1995). It is estimate that More than 30% of soils have low Zn availability. So, Zn is also one of the most deficient micronutrient in soils worldwide (Cakmak, 2002; Shivay et al., 2008)

Occurrence
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In Seawater 30 ppb zinc is present and the atmosphere contains 0.1–4 µg/m3 Zinc is found in the air, soil, and water, and is present in all foods. zinc is a bluish-white shiny metal if it is in pure form. Zinc has many uses in industry in Metallic form. Alloys such as brass and bronze are form by mixing of metallic zinc with other metals. Zinc form salts as it combines with other chemicals. In nature, most zinc ore is found as the salt of zinc sulfide. Sphalerite (ZnS) a element is found in association with other base metals such as copper and lead in ores. Sphalerite ore contain 60-62% zinc. It is the most heavily mined zinc-containing

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