Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2020ChemistryStructure of AtomActual

The number of protons, neutrons and electrons in 71 175 Lu , respectively, are

Options

  1. A104 ,   71 and 71
  2. B71 ,   71 and 104
  3. C175 ,   104 and 71
  4. D71 ,   104 and 71

Correct answer

D. 71 ,   104 and 71

Step-by-step solution

Lu 71 175 protons = 71 neutrons = mass   number - protons = 175 − 71 = 104 electrons = 71

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