Medium
State whether the following statements are true or false:
$(i)$ The chart of elements presented by $Courtois$ could predict the stoichiometry of oxides of some metals.
$(ii)$ $Li, Na, Rb$ are known as $Döbereiner's$ triads.
$(iii)$ In $1863$,$Newlands$ classified the $56$ discovered elements into $18$ groups.
$(iv)$ $Mendeleev's$ periodic table is based on the atomic number of elements.
$(i)$ The chart of elements presented by $Courtois$ could predict the stoichiometry of oxides of some metals.
$(ii)$ $Li, Na, Rb$ are known as $Döbereiner's$ triads.
$(iii)$ In $1863$,$Newlands$ classified the $56$ discovered elements into $18$ groups.
$(iv)$ $Mendeleev's$ periodic table is based on the atomic number of elements.
(A) $(i)$ True: $Courtois$ studied the properties of elements and their oxides.
$(ii)$ False: $Li, Na, K$ form $Döbereiner's$ triad,not $Li, Na, Rb$.
$(iii)$ False: $Newlands$ arranged $56$ elements into $7$ groups (octaves),not $18$.
$(iv)$ False: $Mendeleev's$ periodic table was based on atomic mass,not atomic number.
$(ii)$ False: $Li, Na, K$ form $Döbereiner's$ triad,not $Li, Na, Rb$.
$(iii)$ False: $Newlands$ arranged $56$ elements into $7$ groups (octaves),not $18$.
$(iv)$ False: $Mendeleev's$ periodic table was based on atomic mass,not atomic number.
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Similar Questions
Write a note on the genesis of the periodic table.
Fill in the blanks given below:
$(i)$ The first scientist to think about the properties of elements was ......... .
$(ii)$ The relationship of properties of elements suggested by Dobereiner is known as ........... .
$(iii)$ The Law of Octaves was proposed by the chemist ......... .
$(iv)$ The first periodic table was constructed by .......... and .......... .
$(i)$ The first scientist to think about the properties of elements was ......... .
$(ii)$ The relationship of properties of elements suggested by Dobereiner is known as ........... .
$(iii)$ The Law of Octaves was proposed by the chemist ......... .
$(iv)$ The first periodic table was constructed by .......... and .......... .
Medium
View SolutionWhich scientist used atomic volume as the basis for the periodic classification of elements?
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View SolutionWhat was the basis for Mendeleev's classification of elements in his periodic table?
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View SolutionWhat is the importance of the Periodic Table?
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