Difficult
Describe Mendeleev's periodic table.
(N/A) Mendeleev's periodic law states that the physical and chemical properties of elements are a periodic function of their atomic weights.
Key features of Mendeleev's periodic table include:
$1$. Elements were arranged in order of increasing atomic weights.
$2$. It consisted of $8$ vertical columns called groups and $7$ horizontal rows called periods.
$3$. Mendeleev left gaps for elements that were yet to be discovered (e.g.,Eka-boron,Eka-aluminium,and Eka-silicon).
$4$. It allowed for the systematic study of elements and predicted the properties of unknown elements.
Key features of Mendeleev's periodic table include:
$1$. Elements were arranged in order of increasing atomic weights.
$2$. It consisted of $8$ vertical columns called groups and $7$ horizontal rows called periods.
$3$. Mendeleev left gaps for elements that were yet to be discovered (e.g.,Eka-boron,Eka-aluminium,and Eka-silicon).
$4$. It allowed for the systematic study of elements and predicted the properties of unknown elements.
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View SolutionFill 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 ......... .
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$(i)$ The first scientist to think about the properties of elements was ......... .
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View SolutionMatch 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. |
Easy
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