At the end of this lesson we will be able tounderstand :-Why an atom gets bonded with other atom oratoms.Different types of solids depending upon type of bonding between their particles.Properties of different solids.
Group zero elementsElement Electronic Behavior of configuration atoms 2He4 2 Helium atoms do not bond 10Ne20 2,8 Neon atoms do not bond 18Ar40 2 ,8, 8 Argon atoms do not bond
Argon: 18Ar40 Third shell : 8 electrons Second shell : 8 electrons First shell: 2electrons NucleusEach shell is full .
Magnesium :12 Mg24 Third shell : 2 electrons Second shell : 8 electrons First shell ; 2 electrons NucleusOuter shell not full : only 2 electrons in it
Now I am sure you can tell methat why bonding takes place between two atoms. Press Enter to continue
Types of solids Depending on the type of bonding solids are of Four types – Molecular solids Macromolecular solids Metallic solids Ionic solids
Iodine : a molecular solid I I Two atoms of iodine I I Two atoms bonding together
Summary• Properties of a solid depend on the type of particle in the lattice & the way in which they attract each other in the lattice.• There are three types of bonding – covalent bonding, metallic bonding, ionic bonding .• In all these bonding, the atoms achieve full electron shells .• An ion is a particle which has gained or lost electrons, so is charged .