Atomic Structure

Atomic Structure

1. Structure of an Atom

   • The Nucleus
     • in the middle of the atom,contains protons and neutrons which make up the majority of mass of the atom, has an overall posative charge.
   • Electrons
     • Electrons have a negative charge and virtually no mass. they orbit the nucleus in shells of energy.
   • No. protons = No. Electrons
   • Particals
     • Protons: Relative mass: 1 Relative Charge: +1
     • Neutrons: Relative mass: 1 Relative Charge: 0
     • Electrons: Relative mass: 1/2000 Relative Charge: -1

2. electron Shells

   • only a certain number of electrons are allowed on each shell
     • 1st shell: 2 2nd shell: 8 3rd shell: 8 ect

3. iotopes are different atomic forms of the same element. this means they have the same number of protons different number of neutrons

   • i