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Name: Arsenic
Symbol: As
Number of Energy Levels: 4
Electrons on the outer energy level: 5
Atomic number: 33
Atomic Mass: 74.9216 Amu (Atomic Mass Units)
Protons/Electrons: 33
Neutrons: 42
Density: 5.72 g/cm3
Classification: Metalloid

Arsenic | Chemical elements

Arsenic was discovered in ancient time and its discoverer is unknown. Its name drives from Latin word "arsenicum" and the Greek word "arsenikos". Arsenic’s melting point is at 817.0 °C (1090.15 K, 1502.6 °F) and its boiling point is at 613.0 °C (886.15 K, 1135.4 °F).

Top 16 interesting facts about arsenic

  1. Arsenic occurs in many minerals and also as a pure element.
  2. Although its discoverer is unknown, Albertus Magnus was the first person who documented arsenic in 1250.
  3. At the present time at least 33 isotopes of arsenic have been synthesized but 75-As is the only one stable isotope of arsenic.
  4. Arsenic oxidizes in air when heated having a smell similar to the smell of garlic.
  5. Arsenic is the 53rd most abundant element in Earth’s crust.
  6. A half of the world’s production of arsenic is made in China.
  7. Arsenic is used as a wood preservative since it is toxic to insects, bacteria, and fungi.
  8. Arsenic is used in insecticides in agriculture and in various poisons.
  9. Arsenic is used in feed additives in poultry and swine production, although it has negative consequences on human health.
  10. In medicine, arsenic is used for treating leukemia (blood cancer) and psoriasis.
  11. Alloyed with lead, arsenic is used in car batteries as a strengthener of lead components.
  12. Arsenic is used in semiconductors, especially alloyed with gallium, creating faster circuits.
  13. Arsenic is used in bullets production.
  14. Few species of bacteria use arsenic as fuel for metabolism.
  15. Arsenic is absorbed by all plants with a higher concentration in apples, leafy vegetables, and rice.
  16. Skin cancer has been associated with water that contains significant amount of arsenic.

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