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Why lanthanides and actinides have been ...

Why lanthanides and actinides have been placed separately in the periodic table ?

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They resemble each other but do not resemble any other group elements.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX - INORGANIC VOLUME 1-Exercise very short
  1. The first transition series is called transition series.

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  2. Alkali metals have low ionisation energy. Why is it so?

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  3. Why lanthanides and actinides have been placed separately in the perio...

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  4. Why does the solubility of alkaline earth metal hydroxides in water in...

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  5. Explain : Cation has smaller size than neutral atom. ……………………………...

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  6. Explain : Anion has larger size than neutral atom. ……………………………………...

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  7. Which of the following species will have the largest and the smallest ...

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  8. Which has the largest ionic radius Ca^(2+),Mg^(2+),Ba^(2+)?

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  9. Define various types of atomic radii. Why is covalent radius smaller t...

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  10. Electronegativity is

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  11. Define electronegativity. How does it vary in the periodic table?

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  12. Write the general outer electronic configuration of s-, p-, d- and f- ...

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  13. What is the nature of oxides formed by most of p-block elements?

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  14. Indentify the atom or ion which has larger radius in each of the follo...

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  15. Among the elements , Li, K, Ca, Cl and Kr, the element K has the lowes...

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  16. Which element in each of the following pairs of elements would you exp...

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  17. Ionisation potential increases in a period from left to right because

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  18. Which out of the N or O has higher electron gain enthalpy?

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  19. Which of the following pairs would have a larger size? Explain. Br "...

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  20. Atomic number (Z) of elements is 108. Write its electronic configurati...

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