While non-toxic to humans, carbon nanoparticles are deadly to fruit flies. Graphite and charcoal are considered safe enough to eat. Pure carbon is considered non-toxic, although inhalation of fine particles, such as soot, can damage lung tissue.The German and French words for charcoal are similar. The origin of the name "carbon" comes from the Latin word carbo, for charcoal. Other forms of carbon include fullerenes, graphene, carbon nanofoam, glassy carbon, and Q-carbon (which is magnetic and fluorescent). For example, graphite is an electrical conductor while diamond is an insulator. The forms look very different from each other and display dissimilar properties. While most elements known since ancient time only exist in one allotrope, pure carbon forms graphite, diamond, and amorphous carbon (soot).
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