Brief History of The Development of Periodic Table

IMPORTANT

Brief History of The Development of Periodic Table: Overview

This Topic covers sub-topics such as Newlands' Law of Octaves, Mendeleev's Periodic Law, Mendeleev's Periodic Table, Demerits of Mendeleev's Periodic Table, Discovery of New Elements and, Merits of Mendeleev's Periodic Table

Important Questions on Brief History of The Development of Periodic Table

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 1

Some dissimilar elements are grouped together while some similar elements are placed in different groups in Mendeleev's periodic table.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 2

In Mendeleev's periodic table, similar elements like _____ and mercury are placed at different places.(silver/copper)

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 3

Write any one limitation of Mandelevee's periodic table.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 4

The atomic masses of Li and K are 7 and 39, respectively. According to law of triads the atomic mass of Na will be

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 5

How many elements are known till the end of 2020.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 6

By 1865, how many elements had been identified?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 7

The elements are broadly classified as

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 8

Mendeleev left the gap under aluminium and a gap under silicon having atomic weights 68 and 72 respectively. These elements respectively are 

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 9

In Mendeleev's periodic table, iodine with lower atomic weight than that of tellurium was placed along with 

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 10

Which of the following statements is incorrect?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 11

Which of the following statements is incorrect?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 12

Dissimilar elements have been placed in the same group in the Mendeleev's periodic table ? Comment.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 13

_____ was placed in the group of halogens in Mendeleev's periodic table? (Manganese / Magnesium/ Nitrogen)

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 14

What is the demerit of Mendeleev's periodic table with respect to the arrangement of elements ?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 15

Dissimilar elements have been placed in the same group in the Mendeleev's periodic table.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 16

Some similar elements like copper and _____ are separated in Mendeleev's periodic table.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 17

Some similar elements like copper and mercury are separated in Mendeleev's periodic table.

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 18

Some similar elements like copper and mercury are separated in Mendeleev's periodic table. Explain ?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 19

In Mendeleev's periodic table, gaps were left for the element to be discovered later on. Which of the following elements found a place on the periodic table later on?

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chemistry>Classification of Elements and Periodicity in Properties>Brief History of The Development of Periodic Table> Q 20

Identify the incorrect match.

Name IUPAC Official Name
(a) Unnilunium (i) Mendelevium
(b) Unniltrium (ii) Lawrencium
(c) Unnilhexium (iii) Seaborgium
(d) Unununium (iv) Darmstadtium