The element with atomic number 111 was first named as Unununnium. What is its IUPAC name?
Show Hint
- Nobelium
- Bohrium
- Lawrencium
- Roentgenium
Rutherfordium
The Correct Option is D
Solution and Explanation
Step 1: Elements with atomic numbers beyond 100 were initially assigned systematic names based on their digits.
Step 2: The element with atomic number 111 was initially called Unununnium (Uuu), following the IUPAC temporary naming convention.
Step 3: Later, IUPAC officially named element 111 as Roentgenium (Rg) in honor of Wilhelm Roentgen, the discoverer of X-rays.
Step 4: Therefore, the correct answer is (D).
Top Questions on introduction to organic chemistry
- A crystal is formed by X (cations) and Y (anions). Atoms of Y form ccp and atoms of X occupy half of octahedral voids and half of tetrahedral voids. What is the molecular formula of the crystal?
- TS EAMCET - 2024
- Chemistry
- introduction to organic chemistry
- Which of the following sequence of reagents converts benzoic acid to benzaldehyde?
- TS EAMCET - 2024
- Chemistry
- introduction to organic chemistry
- An organic compound \( C_7H_5N \) on reduction with reagent X gave Y. Reaction of Y with p-toluene sulphonyl chloride gave Z which is insoluble in alkali. X and Y respectively are:
- TS EAMCET - 2024
- Chemistry
- introduction to organic chemistry
- At 300 K, aqueous KCl and aqueous K$_2$SO$_4$ solutions were electrolyzed separately using Pt electrodes. The gases liberated at cathodes in these two electrolytic processes are respectively:
- TS EAMCET - 2024
- Chemistry
- introduction to organic chemistry
- Two statements are given below Statement I: Liquid A and liquid B form a non-ideal solution with positive deviation. \hspace{0.5cm} The interactions between A and B are weaker than A–A and B–B interactions. Statement II: For an ideal solution, \(\Delta_{\text{mix}} H = 2 \text{ kJ mol}^{-1} \); \(\Delta_{\text{mix}} V = 0\).
- TS EAMCET - 2024
- Chemistry
- introduction to organic chemistry
Questions Asked in KEAM exam
- In the measurement of length 6 $\mu$m is equal to $x$ pm. Then the value of $x$ is
- KEAM - 2024
- Dimensional Analysis
- If the lines \( \frac{x-1}{2} = \frac{y-2}{\alpha} = \frac{z-3}{2} \) and \( \frac{x-1}{2} = \frac{y-2}{1} = \frac{z-3}{-2} \) are perpendicular, then the value of \( \alpha \) is:
- KEAM - 2024
- Integration
- An organic compound contains 37.5% C, 12.5% H and the rest oxygen. What is the empirical formula of the compound?
- KEAM - 2024
- Oxygen
- Let A, B, C denote the set of students in a college who play football, basketball, and cricket respectively. If \( n(A) = 60 \), \( n(B) = 55 \), \( n(C) = 70 \), \( n(A \cup B \cup C) = 100 \) and \( n(A \cap B \cap C) = 20 \), then the number of students who play exactly two of these sports is
- KEAM - 2024
- Relations and functions
For the reaction:
\[ 2A + B \rightarrow 2C + D \]
The following kinetic data were obtained for three different experiments performed at the same temperature:
\[ \begin{array}{|c|c|c|c|} \hline \text{Experiment} & [A]_0 \, (\text{M}) & [B]_0 \, (\text{M}) & \text{Initial rate} \, (\text{M/s}) \\ \hline I & 0.10 & 0.10 & 0.10 \\ II & 0.20 & 0.10 & 0.40 \\ III & 0.20 & 0.20 & 0.40 \\ \hline \end{array} \]
The total order and order in [B] for the reaction are respectively:
- KEAM - 2024
- Grignard’s reagents and their uses