Digital scales

Digital scales

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Digital weighing scales. Pieces of graphite, an allotrope of carbon, in a petri dish being weighed on digital scales. The liquid crystal display is showing a reading of twelve grammes. Since carbon's relative atomic mass is approximately twelve, this means there is about one mole unit measurement of carbon here. Graphite is a soft and slippery substance to touch, and has a melting point in excess of 3500 degrees Celsius. It has a wide variety of uses including the "lead" in pencils, as a lubricant in industry, and as a flame retardant. In 1961, the International Union of Pure and Applied Chemistry adopted the isotope carbon-12 as a basis for atomic weights.

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Keywords: 12 grams, carbon, device, digital, digital weighing scales, equipment, graphite, instrument, mole of carbon, on scales, on weighing scales, scales, science, scientific, twelve grammes of carbon, weighing, weighing scales

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