(Physical things) The different forms of matter are composed of one or much chemical elements. Element: A pure substance that cannot be upset(a) down into smaller substances by chemical means at that place are 25 elements are essential to life. Four of these elements are Oxygen (O), Carbon (C), Hydrogen (H), and Nitrogen (N). These make up about 96% of the living matter in your body. atomic number 20 (CA), Phosphorus (P), Potassium (K), sulfur (S), and a f...If you want to show up a full essay, order it on our website: OrderEssay.net
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