An element is a substance composed of a single kind of atom.
{"Image DocumentName": "5 \u2013 definite chemical composition", "Image ImageDescription": "A mineral has a definite chemical composition\u2014 it always contains certain elements in definite amounts.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}