The 1s peak refers to the electron transition from the innermost energy level (1s orbital) to a higher energy level, resulting in the emission of X-rays. It provides information about the electronic structure of an atom.
The amount of energy required to remove an electron from its atomic orbit. It determines how tightly electrons are held by the nucleus.
The arrangement of electrons in different orbitals around the nucleus of an atom.
The minimum amount of energy needed to remove an electron from a neutral atom or ion in its ground state.