FUNDAMENTAL PARTICLES: FUNDAMENTAL PARTICLES: Mass Charge Symbol Nucleus: PROTON 1 amu +1 H+, H, p NEUTRON 1 amu 0 n _________________________________________ ELECTRON very small -1 e - This particle is said to “hold” or “bond” atoms together in molecules.
Atoms (neutral electrostatic charge: # protons = # electrons ) - # Protons = Atomic Number
- Atomic Mass = # Protons + # of Neutrons
- Isotope: same atomic number but different atomic mass (different # of neutrons)
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