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Which elements did Mendeleev leave gaps for in his periodic table and what names did he give them?
(N/A) Mendeleev predicted the existence of several elements that were not discovered at that time. He left gaps in his periodic table for these elements and named them by prefixing the word '$eka-$' (Sanskrit for 'one') to the name of the element immediately preceding them in the same group.
| $Element$ | $Mendeleev's$ $Name$ |
| $Gallium$ | $Eka-aluminium$ |
| $Germanium$ | $Eka-silicon$ |
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Briefly describe the contributions of various scientists to the development of the Periodic Table.
Difficult
View SolutionMendeleev's periodic law is based on
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View SolutionThe modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of the atomic number was:
Match the following and select the correct option.
List-$I$ List-$II$ $(1)$ Lothar Meyer $(A)$ First to present a periodic table showing correct arrangement up to Calcium. $(2)$ $A$.$E$.$B$. de Chancourtois $(B)$ Arranged elements in horizontal and vertical rows based on atomic weight. $(3)$ Newlands $(C)$ Discovered the element with atomic number $101$. $(4)$ Seaborg $(D)$ Suggested that arrangement based on atomic weight is an important concept in the periodic table. $(E)$ Presented the first possible periodic table. $(F)$ Arranged elements into groups of three. $(G)$ Law of Octaves.
| List-$I$ | List-$II$ |
| $(1)$ Lothar Meyer | $(A)$ First to present a periodic table showing correct arrangement up to Calcium. |
| $(2)$ $A$.$E$.$B$. de Chancourtois | $(B)$ Arranged elements in horizontal and vertical rows based on atomic weight. |
| $(3)$ Newlands | $(C)$ Discovered the element with atomic number $101$. |
| $(4)$ Seaborg | $(D)$ Suggested that arrangement based on atomic weight is an important concept in the periodic table. |
| $(E)$ Presented the first possible periodic table. | |
| $(F)$ Arranged elements into groups of three. | |
| $(G)$ Law of Octaves. |
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View SolutionWhich scientist used atomic volume as the basis for the periodic classification of elements?
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