... 0.3 20 3 4 .2 Cu 25 <1–700 30 2 25 0 50 33F 430 <10–3,700 20 0 20 –700 950 640Fe 26 ,000 100–>100,000 40,000 2, 000–550,000 41,000 41,000Ga 17 <5–70 20 2 100 18 18Ge 1 .2 <0.1 2. 5 1 0.10–50 ... polyhedra (Figs. 2. 2A and 2. 2B, respectively) to bond: point-to-point, the most stable configuration,edge-to-edge, and face-to-face, the least stable configuration (Fig. 2. 3). WithTABLE 2. 3. Ionic ... 550 < ;2 7,000 1,000 20 –10,000 950 770Mo 0.97 <3–15 1 .2 0.1–40 1.5 2 N — — 2, 000 20 0–5,000 25 470Na 12, 000 <500–100,000 5,000 150 25 ,000 23 ,000 5,700Nb 11 <10–100 10 6–300 20 13Nd...