Question:
What is the representation of element ( X ) having mass number 40 containing 22 neutrons.
What is the representation of element ( X ) having mass number 40 containing 22 neutrons.
Show Hint
Formula: \(Z = A - N\)
Updated On: May 4, 2026
- \({}^{40}_{20}\text{X}\)
- \({}^{40}_{18}\text{X}\)
- \({}^{40}_{18}\text{X}\)
- \({}^{40}_{22}\text{X}\)
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Concept:
\[
\text{Mass number} = \text{Protons} + \text{Neutrons}
\]
Step 1: Given \[ A = 40,\quad N = 22 \]
Step 2: Calculate atomic number \[ Z = A - N = 40 - 22 = 18 \]
Step 3: Write representation \[ {}^{40}_{18}\text{X} \] Conclusion: \[ \text{Correct answer = (B)} \]
Step 1: Given \[ A = 40,\quad N = 22 \]
Step 2: Calculate atomic number \[ Z = A - N = 40 - 22 = 18 \]
Step 3: Write representation \[ {}^{40}_{18}\text{X} \] Conclusion: \[ \text{Correct answer = (B)} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Atomic Structure Questions
- What is the molar mass of sulfur dioxide (SO$_2)$?
- Which of the following is the correct electron configuration for an oxygen atom?
- What is the molecular mass of $ \text{Na}_2\text{SO}_4 $?
- What is the electronic configuration of \( \text{Cu} \)?
- Number of primary carbon atoms present in 3-Ethyl-2,4-dimethyl heptane is
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions