Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2019ChemistryStructure of AtomActual

Which of the following is not iso electronic with H ₂ ~S ?

Options

  1. AF₂ gas
  2. Boxide ion
  3. CCa ⁺²
  4. DSc ⁺³

Correct answer

B. oxide ion

Step-by-step solution

Key Idea Iso electronic species are those which have same number of electrons. The total number of electrons in the given species are as follows aligned H ₂ ~S & =2+16=18 electrons F ₂ & =9+9=18 electrons O ²⁻ & =8+2=10 electrons Ca ²⁺ & =20-2=18 electrons Sc ³⁺ & =21-3=18 electrons aligned Thus, O ²⁻ (oxide ion) is not iso electronic with H ₂ ~S .

Practice Structure of Atom on Quantrex Academy →

More from Structure of Atom

Identify the pair of atoms of elements as isotones from the following. 2026Which of the following elements has an electronic configuration, [ Ar ] 4s^2 ? 2026Calculate the energy per mole of photons of red light with a wavelength 750 nm. [ h = 6.626 10⁻³⁴ Js, C = 3 10^8 m/s.] 2026Calculate the energy associated with an electron in the first orbit of hydrogen atom? 2026Find the wave number of the 4^ th line in the Lyman series of H spectrum. (R = Rydberg constant) 2026Calculate the de-Broglie wavelength of an electron having velocity 1000 ms ⁻¹ [ h = 6.626 10⁻³⁴ js , mass of an electron = 9.1 10⁻³¹ kg ] 2026How many total number of s and p electrons are respectively present in Cl ^- ? 2026Visible light has a wavelength of 700 nm. Calculate its frequency in hertz. 2026 Full Structure of Atom list All NEET PYQs