Indium (In) is an element with an atomic number of 49. The atomic number represents the number of protons in the nucleus of an atom, and for a neutral atom, it is also equal to the number of electrons. Therefore, indium has 49 electrons.
To determine the number of valence electrons in an element, you can refer to its position on the periodic table. Indium is located in Group 13 (formerly known as Group IIIA) of the periodic table. Elements in Group 13 have three valence electrons. Therefore, indium has three valence electrons.