Q1.Why Ac & La are not included in actinoids and lanthanoids respectively? Q2.Why actinoids show higher oxidation states than lanthanoids? Q3.Fill in the blank:- l because of the ability of lanthanoids to cath fire under small friction they are used to make gas lighter _____.

Asked by nihal sood | 11th Sep, 2010, 10:30: PM

Expert Answer:

Lanthanum does not have eelctrons in 4f orbitals. So, it is not included in lanthanoid series. Hoeever, it is usually included in the discussion about lanthanoids since its properties resemble lanthanoids.
Similarly, Ac does not have electrons in 5f orbitals. So, it is not included in actinoid series. Hoeever, it is usually included in the discussion about actinoids since its properties resemble actinoids.

Answered by  | 13th Sep, 2010, 04:12: PM

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