Question

drawback of newland octave rule ??​

Answer 1

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★ Drawbacks of newland octaves :-

1. this rule is valid up to Ca,because after Car due to presence of d-block elements there is difference of 18 elements instead of 8 elements.

2. after the discovery of inert gas and including them into the periodic table it becomes the 8th elements from akali metal so this last had to dropped out.

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Answer 2

Answer:

#Drawbacks and limitations of Newland Octave rule :-

• This rule is valid only upto Ca. Because after Ca due to presence of d-block element there is difference of 18 elements instead of 8.

• After the discovery of inert gases and included in the periodic table it becomes the 8th element from Alkali metal so this law has to be dropped out.

• He failed in the case of heavier metals as fe has been placed with atoms O and S.