Tue June 12, 2012 By: Prkriti Gupta

Q1:- what does apatite family meant. Q2:- WHAT DO WE MEANT BY COVALENT RADII Q3:-what do we meant by extra stable half filled electrons Q4;- what is ionisation enthalpy pls dont define pls explain in simple language

Expert Reply
Fri June 15, 2012
1. Apatite is a group of phospahte minerals , usually referring to hydroxylapatite, fluoraptite, chlorapitite and bromapitite, named for high concentrations of OH?, F?,Cl- or Br? ions, respectively, in the crystal.
2. when two atoms are chemically bonded through a single bond then half of the bond length is called covalent radii.
3. Extra stable half filled electron means when it is difficult to add electrons or to remove electrons as the half filled is the more stable electronic configuration than neither half filled nor fully filled configuration.
4. Ionization enthalpy means the energy released when the electrons are added to the atom.
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