Chemistry · 2020
JEE Main · 9 January 2020, Shift 1 · Q36
The electronic configurations of bivalent europium and trivalent cerium are: (atomic number: Xe =54, Ce =58, Eu =63 )
The electronic configurations of bivalent europium and trivalent cerium are :
(atomic number : $\displaystyle \mathrm{Xe}=54, \mathrm{Ce}=58, \mathrm{Eu}=63$ )
Official answer
(3)
$\displaystyle [\mathrm{Xe}] 4 \mathrm{f}^7 \text { and }[\mathrm{Xe}] 4 \mathrm{f}^1$
More from d- and f-Block Elements
- The number of element from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and Lu2024
- In alkaline medium, the reduction of permanganate anion involves a gain of ____ electrons.2023
- Arrange the following elements in the increasing order of number of unpaired electrons in it. Sc Cr V Ti (E) Mn Choose the correct answer from the…2024
- The atomic radius of Ag is closest to:2020
- Which of the following statements are correct about Zn, Cd and Hg? A. They exhibit high enthalpy of atomization as the d-subshell is full. B. Zn and…2024
- Which of the following oxidation reactions are carried out by both K_2 Cr_2 O_7 and KMnO_4 in acidic medium? A. I^- → I_2 B. S^2- → S C. Fe^2+ →…2025
- Alkaline oxidative fusion of MnO_2 gives " A " which on electrolytic oxidation in alkaline solution produces B. A and B respectively are2024
- Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is \ \…2022
JEE Main 2020 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.