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What are actinones?...

What are actinones?

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The 14 elements from `90^(th) - 103^(Lw)` are known actinones.
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PATHFINDER-PERIODIC CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES-QUESTION BANK
  1. The Reason for diagonal relationship is -

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  2. The order of ionic redius of N^(3-), O^(2-), F^- and Na^+ is -

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  3. What are actinones?

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  4. The elements A, B and C have atomic numbers Z -2, Z and Z +1 respecive...

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  5. The elements A, B and C have atomic numbers Z -2, Z and Z +1 respecive...

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  6. Why do transition elements have a greater tendency to form co-ordinate...

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  7. Give four defects of 'Mendeleev's periodic table.

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  8. Consider the following species. N^(3-) , O^(2-) , Na^+ , Mg^(+2) , Al...

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  9. Consider the following species. N^(3-) , O^(2-) , Na^+ , Mg^(+2) , Al...

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  10. First I.P. of Be is greater than B.

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  11. First I.P. of N is greater than O Explain.

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  12. The first I.P. of 'C' is greater than of 'B' where as reverse is true ...

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  13. Arrange the following in order of increasing radii. I^-, I, I^+,

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  14. Arrange the following in order of increasing radii. F, Cl, Br

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  15. Electron gain enthalpy of Cl is more negative than F though electroneg...

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  16. What is the reason of periodicity in the periodic table?

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  17. What is the voriation of lonisation Energy in a group?

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  18. If the Electron. Affinity of Chlorine is -3.7 cr then how energy is re...

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  19. What is Lanthanide contraction?

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  20. What is the cause of Lanthanide contraction.

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