Atomic Structure Mindmap

Atomic Structure Mindmap

1. Sub-atomic particles

   • protons
     • charge: 1+
     • relative mass: 1
     • found in nucleus
   • electrons
     • relative mass: 1/1836
     • charge: -1
     • found in spaces outside the nucleus
   • neutrons
     • relative mass: 1
     • charge: 0
     • found in nucleus
   • atoms are composed of these

2. Atomic number

   • the number of protons in an atom

3. Mass Number

   • Sum of protons and neutrons in an atom
   • not to be confused with relative atomic mass
   • never a decimal