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What is meant by lanthanides and actinid...

What is meant by lanthanides and actinides?

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The fourteen elements after `La(57)` are called lanthanides and the fourteen elements after `Ac(89)` are called actinides.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX - INORGANIC VOLUME 1-Exercise very short
  1. The general electronic configuration of d-block elements is

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  2. To which series man-made elements belong?

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  3. What is meant by lanthanides and actinides?

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  4. Which of lanthanides is man-made element?

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  5. What are inner transition metals? Why are they called rare earth metal...

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  6. Give general electronic configuration of f-block elements.

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  7. Which orbitals are filled with electrons in 3rd period?

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  8. Give general electronic configuration of least reactive group. Why are...

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  9. Which of the following requires highest energy: a.M((g)) rarr M((g))...

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  10. How do atomic radius vary in a period and in a group? How do you expla...

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  11. Define (a) ionic radii and (b) covalent radii.

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  12. Why do noble gases have comparatively large atomic sizes?

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  13. Define ionisation energy . What is its value for a hydrogen atom ?

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  14. How does ionisation energy vary (a) down the group and (b) along the p...

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  15. A and B belong to same group of periodic table. A has higher atomic nu...

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  16. The problem of position of isotopes in the periodic table was avoide...

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  17. Two different elements may have same mass number but not the same .

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  18. When compared to lithium, it is easier to remove valence electron from...

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  19. Chlorine has more electron affinity than fluorine.

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  20. Among (the non-radioactive) halogens the element that has the lowest e...

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