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Atomic Theory

Neutron a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen
Electron a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
Proton positive electric charge equal in magnitude to that of an electron, but of opposite sign
Element broken down matter into simpler substances and are primary constituents of matter
Atom the basic unit of a chemical element
Malleable the ability to be hammered or pressed permanently out of shape without breaking
Luster gentle sheen or soft glow
Ductile ability to be drawn into a thin wire
Corrosive rusting
Density mass of an object/thickness
Nobel gas A group of elements that are odorless, colorless, monatomic gases, with low chemical reaction
Halogens any of the elements occupying group (17) of the periodic table
Transitional metals Any of the set of metallic elements occupying a central block (4-12) in the periodic table
Alkali Metals any of the elements occypying Group 1A (1) of the periodic table
Alkaline Earth metals any of the elements occupying group (2) of the periodic table
Alloy combing two or more metallic elements