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TermDefinition
atom The basic particle from which all elements are made; the smallest particle of an elemant that has the properties of that element.
electron A tiny, negatively charged particle that moves around the outside of the nuclear of an atom.
nucleus The center core of an atom which contains protons and neutrons.
proton Small, positively charged particles that are found in the nucleus of an atom.
energy level A region of an atom in which electrons of the same energy are likely to be found.
neutron A small particle in the nucleus of an atom, with no electrical change.
atomic number The number of protons in the nucleus of an atom.
isotope An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
atomic mass The average mass of all the isotopes of an element.
periodic table An arrangement of the elements showing the repeating pattern of the properties.
chemical symbol A one-or-two letter representation of an element.
period A horizontal row of elements in the periodic table.
group Elements in the same vertical column of the periodic table; also called family.
metal A class of elements characterized by physical properties that include shininess, malleability,ducility, and conductivity
luster The way a mineral reflects light from it's surface
malleable A term used to describe material that can be hammered or rolled into flat sheets.
ductile A term used to describe a material that can be pulled out into a long wire.
thermal conductivity The ability of an object to transfer heat.
electrical conductivity The ability of an object to carry electric current.
reactivity The ease and speed with which element combines, or reacts, with other elements and compounds.
corrosion The gradual wearing away of a metal element due to a chemical reaction.
alkali earth metal An element in Group 2 of the periodic table.
transition metal One of the elements in Group 3 through 12 of the periodic table.
alkali metal An element in Group 1 of the periodic table.
nonmetal An element that lack most of the properties of a metal
diatomic molecule A molecule consisting of two atoms.
halogen An element found in Group 17 of the periodic table.
noble gas An element in Group 18 of the periodic table
metalloid An element that has some characteristics of both metal and nonmetals.
semiconductor A substance that can conduct electric current under some conditions.
Created by: wcooper048
 

 



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