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Vocabulary
PS4
Term | Definition |
---|---|
metals | left of the stair step line they lose electrons in chemical reactions conductors of heat and electricity, shiny, malleable, and ductile |
meralloid | border the stair step line , have some properties of both metals and nonmetals |
nonmetals | right of the stair step line , gain electrons in chemical reactions |
periodic law | repeating chemical and physical properties of elements change |
atomic symbol | identifies the element , consists of one two three letters . the first letter is always capitalized other letters are lower case |
proton | positive, in the nucleus has a mass of 1 amu discovered by Rutherford |
neutron | subatomic particle , no charge located in nucleus has a mass of 1 amu discovered by chadwick |
electron | negative subatomic particle located in the electron cloud has a mass of 0 amu discovered by thomson |