The dand fblock elements - Result Question 83

####83. Actinides

[1994]

(a) Are all synthetic elements

(b) Include element 104

(c) Have any short lived isotopes

(d) Have variable valency

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Solution:

  1. (d) Actinides have variable valency due to very small difference in energies of 5f,6d and 7s orbitals. Actinides are the elements from atomic number 89 to 103.


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