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Portable Network Graphic  |  1991-11-09  |  2.2 KB  |  512x342  |  4-bit (4 colors)
   ocr: 20 Click on the best answer 19 IT 18 CI, 2 02 Family Vineeds 2 electrons to reach H2 the octet 12 N2 15 13 - (allow 4 seconds to reset after wrong answers)