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Why are transition elements known as d-b...

Why are transition elements known as d-block elements?

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Transition elements are known as d-block elements because the last electron in them enter the (n-1) d-orbital, i.e., d-orbital of the penultimate shell.
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Why are transition elements so named ?

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  2. Why are transition elements known as d-block elements?

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  3. General electronic configuration of transition metals is

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  4. How many transition series of elements are there in the periodic table...

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  5. How many elements are present in the d-block of the periodic table?

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  6. Though copper, silver and gold atoms have completely filled sets of d-...

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  7. What are the two important oxidation states of group 6 elements of the...

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  8. Which is the most stable oxidation state of titanium (Z=22) in aqueous...

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  9. The electronic configuration of an element is 3d^5 4s^1. Write its (i)...

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  10. Write the highest oxidation state shown by an element with atomic numb...

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  11. Why are compounds of transition elements generally coloured ?

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  12. Why does vanadium pentoxide acts as a catalyst?

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  13. What is the common oxidation state of Cu, Ag and Au?

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  14. Name the metal with tripositive ion represented by the configuration :...

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  15. Out of Cr^(2+) and Cr^(3+), which one is stable in aqueous solution?

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  16. What is meant by 'disproportionation'? Give an example of disproporti...

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  17. Which elements are called ferrous metals ?

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  18. What are platinum metals ?

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  19. What is the highest oxidation state shown by a transition element.

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  20. Name one ore each of manganese and chromium.

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