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vocab words
ps4
Term | Definition |
---|---|
Metals | left of the stair step line; lose electrons in chemical reactions ; good conductors of heat and electricity shiny malleable and ductile |
Metalloid | boarder the stair step line have some properties of both metals and non metals |
Nonmetals | right of stair step line; gain electrons in chemical reactions |
periodic law | repeating chemical and physical properties of element changes |
Atomic symbool | Identifies element; the first letter is always capitalized |
Proton | positive; nucleus; mass of 1 amu; discovered by rutherford |
Neutron | subatomic particle; no charge located in the nucleus; mass 1 amu; discovered by Chadwick |
Electron | negative subatomic particle; located in electron cloud; mass of 0 amu; discovered by thomson |