See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

The Be3+ ion has one electron in the 1s orbital (n = 1) in its ground state. Since beryllium has four protons in its nucleus (Z = 4), the energy of the electron in the 1s orbital of Be3+ can be calculated. 2 2 Z E (1310) kJ / mole n       AITS-FT-I-PCM(Sol.)-JEE(Main)/2023 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 13 2 2 4 (1310) kJ / mole 1       = 2.10 × 104 kJ/mol