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Atoms
Atom | The building blocks of matter; make up EVERYTHING |
Electron | Negatively charged, located outside the nucleus, does not contribute to the atom’s mass. In a neutral atom the number of protons and electrons are equal. |
Proton | Positively charged, located inside the nucleus included in the atom’s mass. Atomic Number = # of protons, determines the element’s identity |
Neutron | No electrical charge, located inside the nucleus, included in the atom’s mass |
Atomic Mass Number | Protons + Neutrons |
Periodic Table | A table consisting of all the different atoms in the world. |
Atomic number | The number of protons in an atom. |
The electrons on the outermost shell | Valence Electrons |