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CH 3 L1-4

TermDefinition
atom the basic particle from which all elements are made
electron A tiny negatively charged particle that moves around outside of the nucleus of a n atom
nucleus the central core of an atom which contains protons and neutrons
proton small positively charged particles 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 charge
atomic number the number of protons in the nucleus of an atom
isotope a atom with the same number of protons and a different number of atoms from the same element
mass number the sum of protons and neutrons in the nucleus of an atom
atomic mass the avg mass of all the isotopes in an element
periodic table an arrangement of elements showing their repeating properties
chemical symbol a one or two letter representation of an element
period a horizontal row of element in the periodic table
group elements in the same vertical colum of the periodic table
metal a class of elements characterized by their physical properties that include shininess malleability ductility and conductivity
luster the way a material reflects light from it s surface
ductile a term 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 be able to carry a current
reactivity the ease and speed at which a element reacts and combines or reacts with other elements and compounds
corrosion the gradual wearing away of a metal element due to a chemical reaction
alkali metal an element in group 1 of the periodic table
alkaline earth metal an element in group 2 of the periodic table
transition metal one of the elements thought 3 - 12 on the periodic table
nonmetal an element that lacks most of the properties of a metal
diatomic molecule a molecule consisting of 2 atoms
halogen an element found in group 17 of the periodic table
noble gas an element in group 18 of the periodic table
metalloid a element that has some characteristics of metals and non metals
semi conductor a substance that can conduct electricity under some conditions
Created by: avitale036
 

 



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