Atomic Structure Map

Atomic Structure Map

1. Isotopes

   • atoms of the same element, same number of protons, different number of neutrons
   • Mass - atomic number = no. of neutrons

2. RAM

   • average mass of the mass of an atom compared to 1/12 of the mass of carbon -12 atom
   • Mass of isotope 1 x % of isotope 1 + mass of isotope 2 x % of isotope 2 ÷ 100
   • (Relative Atomic Mass)

3. Key words

4. Facts

   • Protons
     • Relative mass: 1
     • Relative charge: +1
     • Found in nucleus
   • Neutrons
     • Relative mass: 1
     • Relative charge: 0 (neutral)
     • Found in nucleus
   • Electrons
     • Relative mass: 1
     • Relative charge: -1
     • Found in shells
   • mass number
     • Mass of an atom equal to total number of protons and neutrons
       • Flash cards
   • Protons and neutrons have same mass
     • Always the same number
   • Atomic number
     • Different elements contain different types of atom
       • Atoms are defined by their atomic number
         • Number of protons in atoms nucleus

5. Electronic structure

   • 1st shell: Max. 2 2nd shell: Max. 8 3rd shell: Max. 8 4th shell: Max. 2
   • Electrons start from inner shell outwards
   • Elements in same group have same no. of outer electrons