Atomic structure

Atomic structure

1. Atoms

   • made of 3 particles
     • proton
     • neutron
     • electron
   • small neucleus made of protons and neutrons
     • surronded by empty space then electrons
   • As a whole= NO ELECTRICAL CHARGE
   • total number of protons and neutrons =atomic mass
   • Isotopes
     • atoms of same element with different number of neutrons

2. Protons

   • Relative mass= 1
     • Relative charge= +1
   • affect personality of atom
     • Cahnge the number of protons= different atom
   • Protons= same as atomic number
   • POSITIVE
   • Atoms of same element =same number protons
     • different element different number

3. Neutrons

   • glue atom together
     • Neutrons affect the mass
   • relative mass = 1
     • relative charge= 0
   • to find number of neutrons
     • = Atomic mass - Atomic number
   • NEUTRAL

4. Electrons

   • affect otside world
     • responsible for CHEMICAL REACTIONS
   • on outside of atom
   • relative mass= negligible
     • relative charge= -1
   • = number of protons in neucleus
   • NEGTIVE