Chemistry

Chemistry

1. 4.1 Atoms and Elements/ Periodic Table

   • Atom
     • Proton
       • Positively charged subatomic particle in the nucleus
     • Electon
       • Negatively charged subatomic particle in the electron shells
     • Neutron
       • Neutrally charged subatomic particle in the nucleus
   • Atomic Number
     • = #protons or #electrons
   • Atomic Mass
     • = #protons + #neutrons

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