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PS4
Term | Definition |
---|---|
Metal | Left of the stair step, loose electrons in a chemical reaction, and they are shiny, malleable, ductile and they are good conductors. |
Metalloid | Border the stair step line, and the have properties of both metals and non- metals. |
Non- metal | Right of the stair step line, they gain electrons in chemical reactions. |
Periodic law | Repeating chemical and physical properties of elements change. |
Atomic symbol | Identifies the element, the first letter is always capitalized all others are lower case. |
Protons | Positive, has a mass of 1 amu discovered by Rutherford. |
Neutrons | A subatomic particle with no charge, mass of 1 amu, discovered by Chadwick. |
Electrons | Negative subatomic particle, located in the electron cloud, mass of 0 amu, was discovered by Thompson. |