Atomic chemistry

Atomic chemistry

1. atom

   • ions
     • An atom that has lost or gained an electron.
   • molecule
     • shapes of molecules

2. electrons

3. protons

   • atomic number

4. neutrons

   • atomic mass
     • relative atomic mass
       • The mass an atom compared to one twelfth of carbon.

5. bonding

   • ionic
     • an atom gives or takes an electron. E.g NaCl
   • covalent
     • atoms share electrons E.g H20
     • polar
       • electronegativity chart
         • 0 to 1.7 covalent more than 1.7 ionic
     • non-polar

6. valency

   • the amount of bonds an atom can make.

7. periodic table

   • alkali metals  +1 alkali earth +2 halogens -1 noble 0 transition variable