ATOM

ATOM

1. SMALLEST PART OF AN INDIVIDUAL ELEMENT EXISTING ON ITS OWN

2. NUCLEUS

   • PROTON +1
   • NEUTRONS

3. ELECTRONS-1

   • SHELLS
     • K (2)
       • L (8)
         • M(8)

4. MASS NUMBER

   • TOTAL NUMBER PROTONS & NEUTRONS

5. ION

   • ATOM THAT HAS GAINED OR LOST ELECTRONS
   • ANION
     • GAINS ELECTRONS
     • BECOMES - CHARGE
     • USUALLY NON METAL
   • CATION
     • USUALLY METALS
     • BECOMES + CHARGED
     • +PROTONS EXCEEDS -ELECTRONS

6. ISOTOPE

   • TWO ATOMS OF SAME ELEMENT HAVE DIFFERENT MASS NUMBERS
   • DIFFER IN AMOUNT OF NEUTRONS

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