Chemistry - f-block Question with Solution | TestHub
The number of radioactive elements among lanthanides and actinide
The number of Lanthanides element have greater radius than "Eu" = b
The number of actinides which show +6 oxidation state = c
(Fill your answer as sum of digits till you get the single digit answer)
Answer:
Solution:
Question Explanation:
Find the sum of radioactive f-block elements (a), lanthanides larger than Europium (b), and actinides with a + 6 oxidation state (c), reducing the total to a single digit. Concept:
Radioactivity: Pm(1)+ all Actinides (15).
Atomic Radius: Eu is the largest lanthanide due to its metallic bonding nature. Oxidation States: U, Np, Pu, Am exhibit +6 states.
Solution:
a =16 (1 lanthanide +15 actinides)
b =0 (Europium is the maximum)
c =4(U, Np, Pu, Am)
Total =16 + 0 + 4 = 20
Single Digit Sum = 2 + 0 = 2
Final Answer: 2