How many core electrons are in indium?

Indium (In) has 46 electrons in total. Its electron configuration is [Kr] 4d¹⁰ 5s² 5p¹, meaning it has 36 core electrons (those in the noble gas configuration of krypton) and 10 valence electrons (from the 4d, 5s, and 5p orbitals). Thus, the number of core electrons in indium is 36.