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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. |
Nonmetals | Right of the stair step line, gain electrons in chemical reactions |
Metalloids | Border the stair step line, have both properties of metals and nonmetals |
Periodic Law | States that the repeating chemical and physical properties of elements change |
Atomic Symbol | Identifies the element, first letter is capitalized, all other letters lowercase |
Proton | Positive, located in the nucleus, has a mass of 1 AMU, discovered by Rutherford |
Neutron | No charge, located in the nucleus, has a mass of 1 AMU, discovered by Chadwick |
Electron | Negative, located in the electron cloud, has a mass of 0 AMU, discovered by Thomson |