PS ch 4/5 Periodic Table

defined by the number of protons in the atom

vertical columns on the periodic table, numbered1-18, have similar properties

most exist as solids at room temp.,shiny,ductile,malleable,good conductors of heat&electricity

atoms of the same element with a different number of neutrons

chart with pattern, arranged by increasing atomic # left to right,&physical&chemical properties

neutral atomic particle, innucleus, not always same for specific element

most are gases at room temperature, brittle, poor conductors of heat and  electricity

negatively charged atomic particle, rapidly moving particle, made of leptons

uses the symbol of the element and dots to represent the electrons in the outer energy level

area of the atom in which the electrons are located a specific distance from the nucleus

subatomic particle smaller than atomic particles,only makeup protons and neutrons

have some properties of both metals and nonmetals 

positively charged atomic particle, located in nucleus, are made up of quarks 

unit chosen to represent the size of an atomic nuclear particle

horizontal orientation on Periodic Table, tell us how many energy levels the element will have

smallest piece of matter that still retains the property of the element

number of protons and neutrons in the nucleus

average of all the mass numbers of all the different isotopes of that element 

areas within the electron cloud that hold a certain number of electrons

area of atom holding all the electrons,100,000 times larger than nucleus