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How does the valency of elements vary ...

 How does the valency of elements vary
a) in going down a group
b) in going from left to right in a period of the periodic table.

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a) Valency remains same in a group.
b) Valency first goes on increasing from left to right in a period till middle of period and then drcreases
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How does the valency vary in going down a group?

(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 ?

How does the valency vary in a period on going from left to right?

Write the number of period the modern periodic table has. How do the valency and metallic character of elements vary on moving from left to right in a period ? How do the valency and atomic size of elements vary down a group ?

How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move ? (i) down a group and (ii) from left to right in a period.

Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table?

How does the metallic character of the elements vary (i) in a group, (ii) in a period of the modern periodic table ?

How does the atomic radius change as you go from left to right in a period ?

(i) How does the tendency to gain electrons change as we go down the group ? Give reason. (ii) Given below is a part of the periodic table. How does the valency vary, as we move vertically downward from Li to Fr. Give reason.

ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. An element 'X' has atomic number 13. a] Write its electronic config...

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  2. Choose from the following ""(6)C , ""(8)O, ""(10)N e, ""(11)Na, ""(1...

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  3. How does the valency of elements vary a) in going down a group b)...

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  4. How would the tendency to lose electrons change as you go i] from le...

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  5. i] Atomic radius of hydrogen is 37 pm. Express it in metres. ii] How...

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  6. Arrange the following elements in the descending order of atomic size ...

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  7. The position of elements A, B, C, D in the modern periodic table is gi...

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  8. ‘Hydrogen occupies a unique position in the Modern Periodic Table.' Ju...

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  9. Write the formula of the product formed when the element A (atomic num...

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  10. a) Discuss any two achievements of the Modern Periodic Table. b) Dis...

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  11. a] Why are sodium and chlorine placed in the same period in the Modern...

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  12. What is the basis of the Modern Periodic Table? Why lithium with atomi...

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  13. a] Mention the relative position of metals, non-metals, and metalloids...

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  14. The elements Be, Mg, and 20Ca each having two valence electrons in the...

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  15. Based on the group valency of elements state the formula for the follo...

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  16. State three reasons for placing chlorine and bromine in the same group...

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  17. Atoms of seven elements A, B, C, D, E, F, and Ghave different number o...

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  18. The positions of A, B, C, D, E, F, and in the Modern Periodic Table ar...

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  19. Consider the part of the periodic table given below and answer the fol...

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  20. An element Y has three shells with four electrons in the valence shell...

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