3 & 13. Periodicity & transition metals (1)
For each question choose the answer you consider to be the best.1. Which species has the same configuration of electrons as a Mg2+ ion?A. Na atomB. F+ ionC. Ne atomD. O– ion2. Which best defines electronegativity?A. The energy required for an atom in the gaseous state to gain one electron.B. The attraction between the nucleus and the outermost electron of an atom.