Question:medium
Anion \( X^- \) contains 45 neutrons and 36 electrons. The atomic mass, period number, and state in which "X" exists is:
Anion \( X^- \) contains 45 neutrons and 36 electrons. The atomic mass, period number, and state in which "X" exists is:
Updated On: Apr 4, 2026
- Atomic mass: 80; Period number = 3; State = liquid
- Atomic mass: 35; Period number = 3; State = gas
- Atomic mass: 80; Period number = 4; State = liquid
- Atomic mass: 127; Period number = 5; State = solid
Show Solution
The Correct Option is C
Solution and Explanation
Was this answer helpful?
0
Top Questions on Atomic Structure
Assume internuclear axis to be z-axis, the correct molecular orbital representation of \(\pi^*\) antibonding molecular orbital formed by overlapping between two \(p\) orbitals will be:
- JEE Main - 2026
- Chemistry
- Atomic Structure
- If first ionization enthalpy of Mg is \(738 \, \text{kJ/mol\) then second ionization enthalpy of Mg in kJ/mol will be :
- JEE Main - 2026
- Chemistry
- Atomic Structure
- Which of the following have same radius according to Bohr's theory : (A) Radius of \(1^{st}\) orbit of H-atom.
(B) Radius of \(1^{st}\) orbit of He\(^{+}\).
(C) Radius of \(II^{nd}\) orbit of He\(^{2+}\).
(D) Radius of \(II^{nd}\) orbit of Li\(^{2+}\).
(E) Radius of \(II^{nd}\) orbit of Be\(^{3+}\).- JEE Main - 2026
- Chemistry
- Atomic Structure
- Compare the energy of orbitals for multielectronic species. \[ \begin{array}{c|c|c|c} & n & l & m \\ \hline (A) & 3 & 0 & 0 \\ (B) & 3 & 1 & -1 \\ (C) & 4 & 2 & 0 \\ (D) & 3 & 2 & 1 \\ \end{array} \]
- JEE Main - 2026
- Chemistry
- Atomic Structure
- Want to practice more? Try solving extra ecology questions todayView All Questions
