acid (ASS id) — a substance that turns litmus paper red and makes salts with metals. Weak acids are sour-tasting, strong acids can burn.
alchemist (AL kur mist) — a type of ancient scientist who did chemical experiments to try and find the secret of eternal life, and how to turn other metals into gold
atomic number (uh TOM ik NUHM bur) — the number of protons or electrons that an atom of an element has
atomic weight (uh TOM ik wate) — the weight of an atom of an element compared to the weight an atom of another element, which is used as a standard. Carbon is used as the standard today. It is given an atomic weight of 12.
atoms (AT uhms) — extremely tiny particles that are the basic building blocks of all substances
conductor (kuhn DUHKT tur) — a substance that allows electricity or heat to pass through it easily
electron (i LEK tron) — a tiny particle with a negative electric charge. Electrons are parts of an atom.
element (EL uh muhnt) — a substance that is made up of just one kind of atom
fumigate (FYOO muh gate) — to treat with fumes to disinfect an area or get rid of pests
insulator (IN suh lay tur) — a substance that does not allow electricity or heat to pass through it easily
metalloids (MET uhl oids) — elements that are not metals, but have some similar properties to metals
molecule (MOL uh kyool) — a combination of two or more atoms, joined together by chemical bonds
neutron (NOO tron) — a tiny particle with no electric charge found in the nucleus of the atom
noble gases (NOH buhl GASS iz) — a group of elements, all gases, that do not react with other elements
nucleus (NOO klee uhss) — in chemistry, the nucleus is the central part of a atom
ore (or) — any kind of rock that is rich in a metal
oxide (OX ide) — a compound combining oxygen with one or more metallic elements
periodic table (pihr ee OD ik TAY buhl) — a way of arranging the elements so that elements with similar properties are grouped together
prism (PRIZ uhm) — a specially shaped piece of glass that can split light into separate colors
proton (PROH ton) — a tiny particle with a positive electric charge found in the nucleus of the atom
reactive (ree AK tiv) — an element is chemically reactive if it easily combines with other substances
salt (sawlt) — table salt, or sodium chloride, is the most common salt. Other salts are the result of a reaction between a metal and one or more nonmetals.
spectroscopy (SPEK tross kuh pee) — a way of finding what elements are in something that is glowing or burning, by looking at the spectrum of the light it gives off
spectrum (SPEK truhm) — the pattern of colors and dark areas you get when you split light with a prism
supernova (soo pur NOH vuh) — a massive explosion that happens when a very big star runs out of fuel