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Unit 4 Vocabulary

atomic mass average mass of one atom of an element
periodic table a chart where all elements are organized into periods and groups according to their properties
Chemical symbol one or two letter code that stands for an element; many symbols are abbervaiations of the element name whitch may be english
period chemistry a row of elements in the periodic table arranged by atomic number geology unit of geologic time lasting tens of millions...
group column of elements in the periodic table, in whitch elements have certain properties in common; also called chemical family
matter the material that all objects and substances are made our ; anything that has mass and takes up space.
element substances that are the building blocks of all matter; an element is made up of one kind of atom
compound matter of two or more elements the elements in a compound are chemically bonded, cannot be seperated by physical means
atom smallest particle into whitch an element can be divided and still have the properties of that element
electron negatively charged particle found outside the nucleus of an atom
nucleus biology structer near the center of a cell that contains the cells DNA chemistry center of an atom made up of protons and neutrons
proton positively charged particle with a neutral charge located in the nucleus
neutron in an atom paricle with a neutral charge located in the nucleus
energy level the amount of energy carried by an electron in an atom; determines the electrons average distance from the nucleus
isotube atoms of the same element with diffrent numbers of neutrons in the nucleus and thus diffrent atomic masses
mass number amount of matter in something measured in grams
atomic number number of protons in the nucleus of one atom of an element
metal elements usually soild with a shiny surface metals conduct electricity and thermal energy well
malleable a term used to describe material that can be pounded into shape
ductile a term used to describe a materials that can be pulled out into a long wire
conductivity transfer of heat from a warmer substance through direct contace
reactivity the ease and speed with witch an element combines or reacts with other elements and compounds
corrasion the gradual wearing away of a metal element due to a chemical reaction
alkial 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 in groups 3 through 12 of the periodic
alloy a mixture of two or more elements on e of whitch is a metal
nonmetal an element that lacks most of the properties of a metal
diatomic molecule a molecule consiting of 2 atoms
halogen an element found in group 17 of the periodic table
noble gas an element that lacks most of the properties of a metal
metaloid an element that has some characteristics
semiconductor a substance that can conduct electricity under some conditions
Created by: TeiaraTia