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PS4
Term | Definition |
---|---|
metals | left of the stair step line lose electrons in chemical reactions conductors of heat and electricity,shiny,malleable,and ductile |
metalloid | border the stair step line some properties of both metals and nonmetals |
nonmetal | right of the stair step line gain electrons in chemical reactions |
periodic law | repeating chemical and physical properties of elements change |
atomic symbol | identifies elements first letter capitalized other letters lower case |
proton | positive nucleus mass of 1 amu discovered by rutherford |
neutron | subatomic particle no charge located in nucleus mass of 1 amu discovered by chadwick |
electron | subatomic particle negative located in electron cloud mass of 0amu discovered by thomson |