WBJEE · Chemistry · Chemical Kinetics
After the emission of a \(\beta\)-particle followed by an \(\alpha\)-particle from \({ }_{83}^{214} \mathrm{Bi}\), the number of neurons in the atom is
- A 210
- B 128
- C 129
- D 82
Answer & Solution
Correct Answer
(B) 128
Step-by-step Solution
Detailed explanation
No. of neutrons \(=\) Mass No. \((A)-\) Atomic No. \((Z)=210-82=128\)
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
- \({ }_5 \mathrm{~B}^{10}+{ }_2 \mathrm{He}^4 \rightarrow \mathrm{X}+{ }_{\mathrm{o}} \mathrm{n}^1\)
In the above nuclear reaction ' X ' will beWBJEE 2025 Easy -
The correct order of acidity of above compounds isWBJEE 2023 Easy - The second law of thermodynamics says that in a cyclic process :WBJEE 2009 Easy
- Correct pair of compounds which gives blue colouration/precipitate and white precipitate, respectively, when their Lassaigne's test is separately done isWBJEE 2013 Medium
- The mole fraction of a solute in a binary solution is \(0.1 .\) At \(298 \mathrm{~K}\), molarity of this solution is same as as its molality. Density of this solution at \(298 \mathrm{~K}\) is \(2.0 \mathrm{~g} \mathrm{~cm}^{-3}\). The ratio of molecular weights of the solute and the solvent \(\left(\mathrm{M}_{\text {solute }} / \mathrm{M}_{\text {solvent }}\right)\) isWBJEE 2021 Hard
- Ortho-and para-hydrogens haveWBJEE 2010 Medium
More PYQs from WBJEE
- If \(\cos \theta+i \sin \theta, \theta \in \mathbb{R}\), is the root of the equation
\(a_0 x^n+a_1 \cdot x^{n-1}+\ldots .+a_{n-1} x+a_n=0, a_0, a_1, \ldots \ldots . a_n \in \mathbb{R}, a_0 \neq 0\)
then the value of \(a_1 \sin \theta+a_2 \sin 2 \theta+\ldots .+a_n \sin n \theta\) isWBJEE 2024 Medium - Adiabatic free expansion of ideal gas must beWBJEE 2025 Easy
- Let \(f_n(x)=\tan \frac{x}{2}(1+\sec x)(1+\sec 2 x) \ldots\left(1+\sec 2^n x\right)\), thenWBJEE 2025 Medium
- A uniform long tube is bent into a circle of radius \(\mathrm{R}\) and it lies in vertical plane. Two liquids of same volume but densities \(\rho\) and \(\delta\) fill half the tube. The angle \(\theta\) is
WBJEE 2010 Hard - The value of \(\lambda\) such that the system of equations \(2x-y-2 y=2 ; x-2 y+z=-4\),\(x+y+\lambda z=4,\) has no solution, isWBJEE 2015 Easy
- In the nuclear reaction \({ }_7^{14} \mathrm{~N}+\mathrm{X} \rightarrow{ }_6^{14} \mathrm{C}+{ }_1^1 \mathrm{H}\) the \(\mathrm{X}\) will beWBJEE 2011 Easy