Which among the following is an actinoid element?
Which among the following is an actinoid element?
- Pa
- Lu
- Gd
- Pr
The Correct Option is A
Solution and Explanation
An actinoid element belongs to the actinide series, which is the series of elements in the periodic table with atomic numbers from 89 to 103. Based on this information, we can determine which of the following elements is an actinoid element:
(A) Pa (Z=91) is an actinoid element.
(B) Lu (Z=71) is a lanthanoid (also known as lanthanide) element, not an actinoid element.
(C) Gd (Z=64) is a lanthanoid element, not an actinoid element.
(D) Pr (Z=59) is a lanthanoid element, not an actinoid element.
Therefore, the only actinoid element among the options is: (A) Pa (Z=91)
Top Questions on d -and f -Block Elements
- Match List-I with List-II.Choose the correct answer from the options given below:
List-I
Alkali MetalList-II
Emission Wavelength
in nm(A) Li (I) 589.2 (B) Na (II) 455.5 (C) Rb (III) 670.8 (D) Cs (IV) 780.0 - JEE Main - 2024
- Chemistry
- d -and f -Block Elements
- A first row transition metal with the highest enthalpy of atomisation, upon reaction with oxygen at high temperature, forms oxides of formula \( \text{M}_2\text{O}_n \) (where \( n = 3, 4, 5 \)). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is ___ BM (near integer).
(Given atomic number: \( \text{Sc: 21, Ti: 22, V: 23, Cr: 24, Mn: 25, Fe: 26, Co: 27, Ni: 28, Cu: 29, Zn: 30} \))- JEE Main - 2024
- Chemistry
- d -and f -Block Elements
- A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86 BM. The atomic number of the metal is
- JEE Main - 2024
- Chemistry
- d -and f -Block Elements
- The 'Spin only' Magnetic moment for \([Ni(NH_3)_6]^{2+}\) is _____ × \(10^{−1}\) BM. (given = Atomic number of Ni : 28)
- JEE Main - 2024
- Chemistry
- d -and f -Block Elements
- The compound that is white in color is
- JEE Main - 2024
- Chemistry
- d -and f -Block Elements
Questions Asked in MHT CET exam
- Two monkeys off mass 10 kg and 8 kg are moving along a vertical light rope the former climbing up with an acceleration of 2 m/second square while the latter coming down with a uniform velocity of 2 m/sec square find the tension in the rope at the fixed support
- MHT CET - 2024
- tension
- Which disease is primarily spread by female Anopheles mosquitoes?
- MHT CET - 2024
- HIV and AIDS
- Total genetic content of an organism is called
- MHT CET - 2024
- Non-Mendelian Genetics
- How many ATP molecules are needed as an initial investment in the glycolytic cycle (normal glycolysis)?
- MHT CET - 2024
- Glycolysis
- If \(A=\begin{bmatrix} 2a & -3b\\ 3 & 2\end{bmatrix}\) and \(\text{adj}A = AA^T\), then 2a+3b is?
- MHT CET - 2023
- Matrices
Concepts Used:
Actinoids
Actinoids are a series of elements in the periodic table that have atomic numbers ranging from 89 to 103. These elements are also known as the actinides or the actinide series. They are located in the second row at the bottom of the periodic table, below the lanthanoid series.
The actinoids are all radioactive, with the exception of thorium, and most of them are synthetic, meaning they do not occur naturally on Earth. They are typically found in nuclear reactors or in laboratory experiments.
The actinoids have similar properties to the lanthanoids, as they both have f-electrons that are partially filled. However, the actinoids are generally more reactive and have a greater range of oxidation states compared to the lanthanoids. They also have a greater tendency to form complex ions and compounds.
The actinoids are of great importance in nuclear technology and chemistry, as they are used in nuclear reactors and in the production of nuclear weapons. They also have potential applications in areas such as medical imaging and cancer treatment. However, their radioactive nature means that they can also be highly toxic and pose a significant environmental risk if not handled properly.