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S8P.a
distingwish between atoms and molecules
Term | Definition |
---|---|
Atom | The smallest unit of an element that maintains the properties of that Element |
Element | a substance that cannot be separated or broken down into simpler substances by chemical means |
Nucleus | in physical science, an AtomĀ“s central region, which is made up of Protons and Neutrons |
Proton | a subatomic particle that has a positive charge and that is found in the Nucleus of an Atom |
Neutron | a subatomic particle that has no charge and that is found in the nucleus of an Atom |
Electron | a subatomic particle that has a negative charge |
Atomic Number | the number of Protons in the Nucleus of an Atom; the Atomic number is the same for all Atomsof an Element |
Neutral | having no overall charge |
Atomic Mass | the mass of an Atom expressed in Atomic Mass Units |
Chemical Symbol | a one or two-letter code that represents an Element |