Atomic Structure

Atomic Structure

1. Atoms are made of protons neutrons and electrons

   • The Nucleus contains the proton and neutron
     • Neutrons - Relative charge: 0, Relative mass: 1
     • Proton - Relative charge: +1, Relative mass: 1
   • The electron are found in shells
     • Electrons - Relative charge: -1, Relative mass: 1/1836
   • The mass charge are measured relative to each other because the actual values are very small

2. Atomic Number= number of protons

3. Mass number= number of protons + number of neutrons

4. Isotopes= The same elements with a different amount of neutrons, but same amour of protons

   • Isotopes are atoms with the same atomic number but different mass number
   • The number of neutrons makes no difference to their chemical reactions, which is determined by the number and argument of electrons