Developing the periodic ... of the known elements with non-metals making up the rest. They tend to have opposite properties. Metals are mostly solids;, non-metals liquids or gases.

And elements are the basic building blocks of the universe. On the periodic table ... name "elemental gases." Bromine is always a liquid, while iodine can be a liquid or solid when at room ...

Everything in the world is made from about 100 different chemical elements ... the solids, liquids and gases we see around us. All of the elements have been arranged into the periodic table.