Which of the following exhibits only $+3$ oxidation state?

  • A
    $U$
  • B
    $Th$
  • C
    $Ac$
  • D
    $Pa$

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The electronic configuration of Einsteinium is : (Given atomic number of Einsteinium $= 99$)

Which one of the following lanthanides exhibits $+2$ oxidation state with diamagnetic nature? (Given $Z$ for $Nd=60, Yb=70, La=57, Ce=58$)

The electronic configuration for Neodymium is: (Atomic Number for Neodymium $60$)

The elements with atomic numbers $101$ and $104$ belong to,respectively

Match the element/compound given in List-$I$ with the uses given in List-$II$:
List-$I$ (Element/Compound) List-$II$ (Use)
$A$. Lanthanoid oxide $1$. Production of iron alloys
$B$. Lanthanoid $2$. Television screens
$C$. Mischmetal $3$. Petroleum cracking
$D$. Magnesium based alloy $4$. Lanthanoid metal $+$ iron
$E$. Mixed lanthanoid oxides $5$. Bullet tips
$6$. $X$-ray screens

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