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Inert gases are placed in a separate gro...

Inert gases are placed in a separate group in the Modern Periodic Table
a) State the group number.
b) How many valence electrons do most of them have?
c) Why are they unreactive?
d) Name any two inert gases.

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(a) Group number of inert gases is 18. (b) 8. (c) They are unreactive since their valence shell is completely filled. Hence they have no tendency to lose or gain electrons by participating in a chemical reaction. (d) Helium and Neon (or any other group 18 elements).
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ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)
  1. Why are metals electropositive and non-metals electronegative in natur...

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  2. Name three elements with seven valence electrons in their outermost sh...

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  3. Inert gases are placed in a separate group in the Modern Periodic Tabl...

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  4. a] What are metalloids? Write any two examples. b] Given below are s...

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  5. a] Write the trend of atomic size and metallic character along a group...

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  6. a] Name the element with atomic number 17.   b]To which period does i...

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  7. Draw a part of the long form of the periodic table showing a non-metal...

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  8. (i) Predict which of the following elements will form cation and will ...

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  9. Write the name, symbol and electronic configuration of an element X wh...

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  10. The electronic configuration of an element is 2, 8, 4. State its i] ...

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  11. Can the following groups of elements be classified as Dobereiner's Tri...

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  12. An element 'X' has atomic number 13. a] Write its electronic config...

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

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

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

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

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

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

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

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

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