Metallic bond
Valence electrons of metallic -atoms are loosely held and move around the metallic crystal forming metallic ions. Metallic ions are
• held together by the attractive force of the moving electron cloud or sea of electrons.
Octet Rule
In forming a chemical bond, atoms gain or Llose or share electrons in such a way to attain the stable electronic structure of the noble gases i.e., to have eight' electrons in the outermost shell.
Transition metals
The metals- at the central portion of the periodic table are called transition metals. They are d and f block elements.
