Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
EasyWrite true or false for the statement: It was assumed by Newlands that only $63$ elements existed in nature and no more elements would be discovered in the future.
(FALSE) The statement is False. John Newlands assumed that only $56$ elements existed in nature and that no more elements would be discovered in the future. The number $63$ is associated with the number of elements known at the time of Mendeleev's Periodic Table.
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An element which is an essential constituent of all organic compounds belongs to :
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View SolutionDefine Newlands' law of Octaves.
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View SolutionThree elements $X$,$Y$,and $Z$ having atomic numbers $11$,$7$,and $6$ respectively react with oxygen to form their oxides.
$(a)$ Arrange these oxides in increasing order of their basic nature.
$(b)$ Give reason for your answer.
$(a)$ Arrange these oxides in increasing order of their basic nature.
$(b)$ Give reason for your answer.
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