JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The electronic configuration of Einsteinium is _______. (Given atomic number of Einsteinium \(=99\) )
- A \([\mathrm{Rn}] 5 \mathrm{f}^{12} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
- B \([\mathrm{Rn}] 5 \mathrm{f}^{11} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
- C \([\mathrm{Rn}] 5 \mathrm{f}^{13} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
- D \([\mathrm{Rn}] 5 \mathrm{f}^{10} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
Answer & Solution
Correct Answer
(B) \([\mathrm{Rn}] 5 \mathrm{f}^{11} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
Step-by-step Solution
Detailed explanation
Einsteinium (atomic No \(=99):[\mathrm{Rn}] 5 \mathrm{f}^{11} 6 \mathrm{~d}^0 7 \mathrm{~s}^2\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Given below are two statements: One is labelled as Assertion \(A\) and the other is labelled as Reason \(R\) Assertion \(A\): Permanganate titrations are not performed in presence of hydrochloric acid. Reason \(R\) : Chlorine is formed as a consequence of oxidation of hydrochloric acid. In the light of the above statements, choose the correct answer from the options given below.JEE Mains 2022 Medium
- For elements \(B , C , N , Li , Be , O\) and \(F\) the correct order of first ionization enthalpy isJEE Mains 2023 Medium
- Identify the correct pair having amino acid (A) and the hormone (B) that is iodinated derivative of the amino acid (A).
(T and Y represent one letter code for amino acids)Amino acid (A) Hormone (B) JEE Mains 2026 Medium - Two solutions \(A\) and \(B\) are prepared by dissolving \(1\,g\) of non-volatile solutes \(X\) and \(Y\). respectively in \(1\,kg\) of water. The ratio of depression in freezing points for \(A\) and \(B\) is found to be \(1: 4\). The ratio of molar masses of \(X\) and \(Y\) is.JEE Mains 2022 Medium
- In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is ______ \(\times 10^{-1} \%\).
(Molar mass : \(\mathrm{O}=16, \mathrm{~S}=32, \mathrm{Ba}=137\) in \(\mathrm{g} \mathrm{mol}^{-1}\) )JEE Mains 2025 Medium - Assertion : Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.JEE Mains 2015 Medium
More PYQs from JEE Mains
- Let one root of the quadratic equation in \(x\): \((k^2 - 15k + 27)x^2 + 9(k-1)x + 18 = 0\) be twice the other. Then the length of the latus rectum of the parabola \(y^2 = 6kx\) is equal to:JEE Mains 2026 Medium
- Two soap bubbles coalesce to form a single bubble. If \(V\) is the subsequent change in volume of contained air and \(S\) change in total surface area, \(T\) is the surface tension and \(P\) atmospheric pressure, then which of the following relation is correct?JEE Mains 2014 Hard
- The type of oxide formed by the element among \(\mathrm{Li}, \mathrm{Na}, \mathrm{Be}, \mathrm{Mg}, \mathrm{B}\) and Al that has the least atomic radius is :JEE Mains 2025 Hard
- Let \(\mathrm{a}\) and \(\mathrm{b}\) be be two distinct positive real numbers. Let \(11^{\text {th }}\) term of a \(GP\), whose first term is \(a\) and third term is \(b\), is equal to \(p^{\text {th }}\) term of another \(GP\), whose first term is \(a\) and fifth term is \(b\). Then \(\mathrm{p}\) is equal toJEE Mains 2024 Hard
- If \(1 + {x^4} + {x^5} = \sum\limits_{i = 0}^5 {{a_i}\,(1 + {x})^i,} \) for all \(x\) in \(R,\) then \(a_2\) isJEE Mains 2014 Hard
- A vessel contains \(14\,g\) of nitrogen gas at a temperature of \(27^{\circ}\,C\). The amount of heat to be transferred to the gap to double the r.m.s. speed of its molecules will be \(......J\) \(\left(\right.\) Take \(R =8.32\,J\,mol ^{-1} k ^{-1}\) )JEE Mains 2022 Medium