The atom

The atom

1. Structure

   • Electron: Are negatively charged and their values are about 0.0005amu
   • Proton: Are positively charged and their values are about 1amu
   • Neutron: Are neutral charged and their values are about 1amu
   • Electron cloud: Is ​the region of negative charge surrounding an atomic nucleus that is associated with an atomic orbital.

2. Octet rule: states that atoms tend to form compounds in ways that give them eight valence electrons and thus the electron configuration of a noble gas.

3. Lewis dot structure: are diagrams that represent the valence electrons of atoms within a molecule.