Chemistry

Chemistry

1. Subatomic particles

   • Electron (-)
   • Proton (+)
     • Atomic number = no. of protons
   • Neutrons (0)
     • Mass No. = Protons + Neutrons
       • Isotopes
         • atoms of an element that have different mass numbers due to different number of neutrons

2. Matter

   • anything that has mass and occupies space
   • Atom
     • smallest particle of an element (in reaction)
   • Ion
     • charged particle (+) or (-)
     • Anions (-) and Cations (+)
     • Lewis Dot diagram (valance shell only)
   • Molecule
     • at least 2 chemically bonded atoms
     • Element
       • identical atoms 
     • Compound
       • differnet atoms of ions

3. Bonds

   • Ionic
     • Cation and Anion
     • Electrostatic attraction
   • Covalent
     • Non-metals
     • sharing electrons

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