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.

Players read questions about energy levels and score points by picking the correct element as the answer ... producing sodium hydroxide and hydrogen gas. The demonstration shown in this video is very ...

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 ...

For all their nobility, elements of group 18 have lived in relative obscurity. In 1869, Mendeleev's first periodic table ... liquid air residues, but having isolated the lighter noble gases ...

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.