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  • Helium, atomic model. Chemical element and noble gas with symbol He and atomic number 2. Bohr model of helium-4, with atomic nucleus of 2 protons, 2 neutrons, and with 2 electrons in the atomic shell. Puzzle #593547846
Helium, atomic model. Chemical element and noble gas with symbol He and atomic number 2. Bohr model of helium-4, with atomic nucleus of 2 protons, 2 neutrons, and with 2 electrons in the atomic shell. puzzle #593547846

  • - 3 sizes: 48, 500 & 1,000 pieces
  • - Durable, glossy-coated paperboard
  • - Full-bleed, photo-quality printing
  • - Storage box included

$39.95

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