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Download Symbol: Zn Atomic Number 30 Atomic Weight 65.409
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Zinc Symbol: Zn ♥ Atomic Number ♣ ♥ 30 Atomic Weight ♣ 65.409 ♥ ♥ ♥ Melting Point ♣ 419.23°C ♣ 787.15°F ♣ 692.68K Boiling Point ♣ 907°C ♣ 1665°F ♣ 1180K Color ♣ bluish gray ♥ State of Matter at Room Temperature ♣ Crystalline Metal (Solid) ♥ Malleability ♣ Zinc is flexible between 100°-105°C ♥ Density ♣ ♥ Hardness ♣ ♥ 2.5 Mohs Texture ♣ ♥ 7.134 g/cm3 at 20°C Smooth Ductility ♣ Zinc can be molded between 110°-150°C ♥ (Thermal) Conductivity ♣ 300 K ♥ Flammability ♣ Burns in the air at high red heat with evolution of white clouds of the Zinc Oxide ♥ Toxicity ♣ Fatal in high concentrations Discovery of the Element ♥ Andreas Sigismund Marggraf rediscovered zinc in Europe in 1746. ♥ Uses ♣ protective coating for iron and steel ♣ To purify water. ♣ Used in vitamins and medicines ♣ as plates for dry electric cells ♥ The Romans used zinc with copper to make brass kettles and coins. ♥ Compounds ♣ Brass ♦ Screws ♦ Hardware ♦ Musical Instruments ♣ Zinc Oxide (best known and most commonly used) ♦ a paint pigment ♦ a filler in rubber tires ♦ an antiseptic ointment ♣ ♣ Zinc chloride ♦ a wood preservative ♦ a soldering fluid Zinc sulfide ♦ As lighting for the screens of television tubes ♦ In fluorescent coatings. ♥ Industrial Uses of: ♣ Zinc ♦ Die casting ♦ Iron coating ♦ Used as part of the containers of batteries especially as anode in alkaline batteries. ♣ ♣ Zinc Oxide ♦ in the rubber industry ♦ as opaque sunscreen Zinc Chloride ♦ in deodorants ♣ Zinc Pyrithione ♦ anti-dandruff shampoos ♣ Zinc Sulfide ♦ in luminescent paints ♣ Zinc Methyl or Zinc Diethyl ♦ in the organic laboratory ♥ Way Zinc appears naturally ♣ ♥ Zinc Ore How Zinc is mined ♣ Zinc is extracted from zinc ore using the metallurgy process Environmental Concerns ♥ The amount of zinc in the environment is increasing because of humans ♥ Large quantities of zinc in industrial waste water is causing the water to become acidic ♥ Zinc gets in the bodies of fish causing it to move up the food chain ♥ The increase of zinc in soil contaminates water in the ground ♥ Zinc can be a threat to plants as well as animals ♥ Zinc affects earth worms which makes them unable to break down soil as fast ♥ Zinc compounds pollute the air and are harmful to breathe in ♣ zinc chloride, zinc oxide, zinc sulfate and zinc sulfide FUN FACTS ♥ Specific gravity of zinc is 7.14 ♥ It ranks about 24th in abundance among the elements in Earth’s crust ♥ Roughly one quarter of all zinc output is consumed in the form of zinc compounds ♥ Is the primary metal used in making American cents since 1982 ♥ It is the 23rd most abundant metal in the Earth’s crust ♥ Zinc deficient animals require 50% more food to gain the same weight of an animal supplied with adequate amounts of zinc ♥ The average human body contains 2.5 grams and takes in about 15 milligrams of zinc per day ♥ Zinc is the 2nd most common trace metal, after iron, naturally found in the human body ♥ Sometimes it is used in fireworks on account of its great combustibility Antonia Cianflone & Meave Kernan Period 5
