Atoms

Atoms

1. ARE MOSTLY EMPTY SPACE

   • MASS IS IN THE CENTRE OF THE ATOM
     • NEUTRONS
       • RELATIVE ATOMIC MASS
         • IS
           • THE AVERAGE MASS OF AN ATOM OF AN ELEMENT RELATIVE TO 1/12 OF CARBON 12
     • + PROTONS

2. HAVE

   • ISOTOPES
     • RELATIVE ISOTOPIC MASS
       • MASS OF ONE ISOTOPE OF AN ELEMENT RELATIVE TO 1/12 OF 12g OF CARBON-12
     • ATOMS OF THE SAME ELEMENT WITH DIFFERENT NUMBER OF NEUTRONS

3. ions

   • Anions
     • GAINED ELECTRONS
   • Cations
     • LOST ELECTRONS
   • + OR - CHARGED ATOMS

4. ELECTRONS SURROUND THE NUCLEUS IN ORBITS

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