9. Answer the following II

 

i. MetalsSubstancesElements Non-metals with significant differences in properties were grouped. (Soft metals like sodium and potassium were mixed in with hard metals like copper and silver).

ii. The substanceelementmetalmolecule hydrogen could not be assigned to a specific position. (OxygenChlorineNitrogenHydrogen was placed in between the metals).

iii. Throughout the experiment, the increasing order of atomic mass atomic volumeatomic particleatomic number was not strictly followed.

iv. AtomsIsotopesIsobarsIsotones have no place in the periodic table.