Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202520 Apr 2025Morning ShiftChemistryd and f Block ElementsActual

Which from following is a lanthanoid element?

Options

  1. AEr
  2. BAm
  3. CNp
  4. DLr

Correct answer

A. Er

Step-by-step solution

The f-block elements are divided into two series: lanthanoids (atomic numbers 58–71) and actinoids (atomic numbers 90–103). Erbium (Er, Z = 68) is a lanthanoid, while americium (Am, Z = 95), neptunium (Np, Z = 93), and lawrencium (Lr, Z = 103) are actinoids. The element that is not an actinoid is erbium.

Practice d and f Block Elements on Quantrex Academy →

More from d and f Block Elements

Pick out the correct option Assertion(A): Mercury is not considered as a transition element Reason (R): Mercury is a liquid 2026Which of the following does not correctly represent the order of the property indicated against it? 2026The element with the highest third ionisation enthalpy is: 2026The product and its colour when MnO₂ is fused with KOH in presence of O₂ : 2026The ion that has a spin only magnetic moment of 5.9 BM is: 2026Which one of the following species will impart colour to an aqueous solution? 2026The basic character of transition metal monoxides follows the order: 2026K ₂ Cr ₂ O ₇ on heating with aqueous NaOH gives ------------------------- 2026 Full d and f Block Elements list All MHT CET PYQs