Which atom or ion is the largest? A. K B. K + C. Ca D. Ca2 + E. Li

Consequently, the ion with the greatest nuclear charge (Al 3 + ) is the smallest, and the ion with the smallest nuclear charge (N 3-) is the largest. The neon atom in this isoelectronic series is not listed in Table 2.8.3, because neon forms no covalent or ionic compounds and hence its radius is difficult to measure.