Organic modeling kit
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Organic substances structures modeling kit.Kit includes: atom of nitrogen, 5-valent (dark blue) – 4 pieces, atom of nitrogen 3-valent (dark blue) – 4 pieces, atom of oxygen 2-valent (red) – 4 pieces, atom of sulfur 2-valent (yellow) – 8 pieces, atom of sulfur 6-valent (yellow) – 4 pieces, atom of carbon 4-valent (black) – 8 pieces, atom of phosphorus 5-valent (violet) – 4 pieces, flexible connecting elements – 80 pieces, model Benzol rings – 3 pieces, a suitcase for storage and transporting the equipment, universal elements –4 pieces.3.4.