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Created with Fabric.js 1.4.5 Zinc THE BASICS: Symbol: ZnAtomic Number: 30 Atomic Mass: 65.39Group: 12Period: 4 A Little History... - named after the german word Zinc- Discovered in 1746 by German Chemist Andreas Sigismund Margraff- Before Zinc was discovered Zinc was used to make brass and zinc compounds were used to heal wounds- Discovered Zinc by heating Calamine and Carbon - Andreas is from berlin- 1709-1782- in 1747 discovered sugar in beets and devised a method with alcohol to extract it Andreas Sigismund Margaff Physical Zinc Color: Bluish-White metal- Brittle at ambient temperatures, but malleable at 100-150 degrees C-Conductor of electricity Density: 7.14 g/mL (will sink in water and is relatively heavy) Melting point: 420 CBoiling point: 907 CRoom Temp: Solid Zinc Uses -Used to galvanise metals to prevent rusting- Used to produce die-casting-Used in alloys-Zinc oxide is used to manufacture products - Zinc sulfide is used to make x-rays Important to the automobile, electrical and hardware industries Such as brass, nickel, silver, and aluminum solder such as paints, rubbers, inks, soaps, batteries, cosmetics etc Isotopes of Zinc ^64Zn,^66Zn, ^67Zn, ^68Zn, and ^70Zn with ^64Zn being the most abundant Reactions With Zinc Reactions:Air, Bases, Acids No reaction : Water -tarnishes in moist air-burns in air to form the white zinc(II)2Zn(s) + O2(g) 2ZnO(s) -dissolves in aqueous alkalis such as potassium hydroxide, KOH, to form zincates such as Zn(OH)4]2- -dissolves slowly in dilute sulphuric acid to form solutions containing the aquated Zn(II) ion together with hydrogen gas, H2. --In practice, the Zn(II) is present as the complex ion [Zn(OH2)6]2+. Fun Facts - Zinc is present in rocks and soil, but also in air, water and the biosphere. Humans, plants, and animals also contain zinc-Zinc is the 4th most widely consumed metal in the world -After 1983 the US Lincoln Memorial pennies are made of 97.5% zinc then plated with a thin coating of copper More Facts... The Seven Reasons Zinc is good for Your Body1. Boosts the immune system2. Prevents lower respiratory infections3. Helps treat Acne4. Makes proteins & DNA5. Helps with the growth and the development of the body6. Heals wounds7. Gives senses of smell and tastebut too much can be harmful Zinc shares characteristics with 3 other elements
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