Atomic structure

Atomic structure

1. It contains a nucleus that has protons and neutrons, surrounded by electrons in shells

2. Element (p) atomic number=7 mass number=14 number of protons =7 Number of electrons =7 Electron Configuration=2.6

   • An atom is the smallest partical of a chemical element that can exist

3. A normal hydrogen atom has 1 neutron

   • A substance made of only one type of atom is called an element
     • potassium has 8 electrons around its electron shell
       • NaCl is the chemical formulae for sodium chloride
         • if sodium is burned in a chlorine gas a compound dissolves into a liguid the colour would have no colour