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elements a pure substance that can not be separated into simpler substances by chemical or physical means
chemical symbol the symbol that represents each element on thhe periodic table
atom the smallest unit of elements that has all of the properties of that element
chemical reaction the process by which one or more substances change to produce one or more different substances
groups the columns on the periodic table that arrange the elements by select characteristics
matter anything that has volume and mass
pure substance matter that is made up of the same particles throughout
compound matter that is composed of two or mote elements that are chemically combined
solid earth oxygen and silicon are made of matter that are make up the rock and minerals of earths crust
oceans water s made up of the elements hydrogen and oxygen
periods the rows of the periodic table that classify the elements by select characteristics
atomic number the numbers of protons (positive charge)in an atomic nucleus
elements of the system only a small number of different elements comprise the majority of matter found in earhs systems
atmosphere a mixture of mainly nitrogen and oxygen with small amount of other gases that surround earth
Created by: lizardflash