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In Mendelev's modified periodic table, t...

In Mendelev's modified periodic table, there are_________vertical column called groups.

A

seven

B

nine

C

eight

D

six

Text Solution

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The correct Answer is:
B
They are designated as `O, I,______VIII`. Except zero and eighth groups, each of the groups is divided into two subgroups designated as `A` (elements lying on the left-hand side of the group) and `B` (elements lying on the right-hand side). This subdivision was made to account the difference in the properties of these elements.
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In Mendeleev's original periodic table, there were six horixontal rows (called seried) further subdivided to give a total of 12 . In Mendeleev's modified periodic table, there are ________horizontal rows (called periods).

In the modified Mendeleev's periodic table, the 18 vertical columns were divided into______groups.

In Mendeleev's periodic table group VIII contains________elements.

The short form of the modern periodic table of the elements (also called Bohr's table) is the most convenient and widely used version of the periodic table. It consists of_______horizontal rows called periods and________vertical columbs called groups.

Write the number of vertical columns in the modern periodic table. What are these columns called ?

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: How many groups are there in the modern periodic table?

R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Follow-up Test
  1. Mebdeleev's classification was a great improvement over contemporary t...

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  2. Which of the following elements were not known when Mendeleev publishe...

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  3. In Mendelev's modified periodic table, there arevertical column called...

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  4. In Mendeleev's periodic table group VIII containselements.

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  5. In Mendeleev's original periodic table, there were six horixontal rows...

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  6. Mendeleev's periodic table simplified and systematized the study of th...

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  7. One especially farishted feature of Mendeleev's accomplishment was his...

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  8. Mendeleev's propdicted the properties of unknown elements.

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  9. Mebdeleev's periodic table has helped in correcting the doubtful atomi...

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  10. The position of hydrogen in Mendeleev's periodic table is not fixed bu...

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  11. In Mendeleev's table, although most of the elements were placed in the...

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  12. Since its birth in 1869, the Mendeleev periodic table has been discuss...

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  13. The empirical evolution of the periodic table reached its peak in 1913...

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  14. Which of the following gives a straight line?

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  15. Which of the following correctely describes Moseley's law?

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  16. Moden periodic law states that the properties of the elements are peri...

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  17. The physical and chemical properties of the elements denpend upton the...

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  18. The cause of periodicity in properties of the elements is the repetiti...

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  19. Which of the following numbers are called magic numbers?

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  20. The short form of the modern periodic table of the elements (also call...

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