7. Intext Questions VII

 

(i) Newlands law of octaves applied to the classification of elements up to lithiumpotassiumsodiumcalcium only. After calcium, every eighth element did not possess properties similar to that of the first element.

 

(ii) Newlands assumed that only 56525557 elements existed in nature and no more elements would be discovered in the future. But later on, several new elements were discovered whose properties did not fit into Newlands’ law of Octaves.

 

(iii) To fit elements into his table, Newlands put even two elements together in zerotwothreeone slot and that too in the column of unlike elements having very different properties.

For example, the two elements, cobalt (Co) and nickel (Ni), were put together in just threezeroonetwo slot in the column of elements like fluorine, chlorine and bromine, which have very different properties from these elements.

 

(iv) CobaltIronNickelCalcium element, which resembles elements like cobalt and nickel in properties, was placed far away from these elements.