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Home > Chemistry

Isotopes - Page 11

Questions
  • What is the isotopic symbol for an element with #47# protons and #68# neutrons?
  • A hypothetical pure element consists entirely of two isotopes. The natural percent abun- dance of the isotope with mass 25.2 u is 24.2%. The other isotope has mass 30 u. Calculatethe atomic weight of the naturally occurring element?
  • What is the isotopic distribution of the boron atom?
  • How many grams of Pb are present in 1.8 x 1022 molecules of Lead (II) Iodide?
  • A 1956 dime is made of a silver-copper alloy and has a mass of 2.490. The dime was dissolved in nitric acid and a blue solution remained. The solution quantitatively transferred to a 100mL volumetric flask and brought to volume with water...?
  • What is the abundance of #""^18O#?
  • What are the isotopes of nitrogen?