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Term | Definition |
---|---|
metal | left side of the stair-step line |
nonmetal | right side of the stair-step line |
metalloid | border of the stair-step line |
periodic law | repeating chemical and physical properties of elements change |
proton | a positive subatomic particle that is located in the nucleus having a mass of 1amu. |
neutron | a subatomic particle with no charge that is located in the nucleus having a mass of 1amu. |
electron | a negative subatomic particle that is located in the electron cloud having a mass of 0amu |
atomic symbol | identifies the elements ,consists of two,or three letters |