The words contained in this file might help you see if this file matches what you are looking for:

...Chapter classifications of elements and periodicity exercise questions question what is the basic theme organisation in periodic table answer organization to classify period groups according their properties this arrangement makes study compounds simple systematic with similar are placed same group which important property did mendeleev use his he stick that was first develop a gave law called states physical chemical function atomic masses on basis developed where arranged ordered by weight or mass periods order increasing however not for long found out if were strictly weights then some fit within scheme classification therefore ignored cases example iodine lower than tellurium still vi before vii simply because s so tofluorine chlorine bromine difference approach between modern other hand numbers quantum justify sixth class https www adda com school ncert solutions should have corresponds n orbitals viz one seven f five d three p filled these sixteen can accommodate there terms woul...