Explain the merit and demerit of mendleeve periodic table newlands law of octaves .
Answers
merits of mendeleev periodic table
Gaps for undiscovered elements .
Incorrect atomic mass corrected
demerits of mendeleev periodic table
Te position of hydrogen was not given .
Element which are chemically similar have been kept in separate groups.
merits of newland
it relates the property of the element to their atomic masses.
for the first time it was shown that there is a distinct periodicity in the properties of elements.
demerits of newland
After the discovery of the noble gases idea of Octave did not work .
as more and more element was discovered they could not be fitted into newland octave .
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Answer:
Newland's law of octaves: According to this law, the elements when arranged in order of their increasing atomic masses, the eighth suceeding element was the repetition of the first one like 8th note of the musical scale,i.e., after a difference of seven, elements with similar characteristics were observed
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