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The longest period in the Modern Periodi...

The longest period in the Modern Periodic Table is the

A

Third period

B

Fourth period

C

Fifth period

D

Sixth period

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The correct Answer is:
D
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Modern periodic table is based on

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a] Why are sodium and chlorine placed in the same period in the Modern Periodic Table? b] Why do elements placed in the same group of the periodic table have similar chemical properties? c] Who proposed the modern periodic law? On which fundamental property of an atom is it based?

What is ionisation energy? How does ionisation energy vary along the period in the modern periodic table ?

a] Write the trend of atomic size and metallic character along a group and a period in the Modern Periodic Table. b]"Elements in the periodic table show periodicity of properties." List any four such properties.

How does the tendency of the elements to lose electrons change in the Modern Periodic Table in (i) a group, (ii) a period and why?

(a) Define the following terms: (i) Valency, (ii) Atomic size. (b) How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table ?

(i) Atomic number of Mg and Al are 12 and 13, respectively. Write down their electronic configuration. (ii) Mention the period of the modern periodic table to which the above two elements belong. Give reason for your answer.

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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (MULTIPLE CHOICE QUESTIONS)
  1. Which element was not known when Mendeleev framed the periodic table?

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  2. Chemical properties of elements depend on

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  3. Which of the following properties of the elements can't be predicted f...

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  4. Non-metals usually form

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  5. In the Modern Periodic Table, elements with similar valenceshell confi...

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  6. Elements in the same group of the periodic table have the same

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  7. Which of the following always increases down a group?

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  8. Which of the following always decreases down a group?

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  9. Which parameter decreases as we move from left to right along a period...

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  10. The number of valence electrons in an element belonging to period 3 an...

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  11. The period and group number of an element with atomic number 7 are

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  12. The number of which of the following atomic particles plays a major ro...

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  13. The longest period in the Modern Periodic Table is the

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  14. Group I elements in the Modern Periodic Table are known as

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  15. The most reactive element of all the elements is

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  16. According to Newlands' law of octaves, the number of elements between ...

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  17. Halogens are present in which group of the Modern Periodic Table?

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  18. The 18th group of elements in the periodic table is called

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  19. The electronic configuration of element x is 2, 8, 8, 1 and the electr...

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  20. The number of groups and periods in the modern periodic table respecti...

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