1. Of the noble gases Ne, Ar, Kr, and Xe, which should be the most chemically reactive? 2. The melt.

1. Of the noble gases Ne, Ar, Kr, and Xe, which should be the most chemically reactive? 2. The melt temperature of Na is 89°C and is higher than the melt temperature of K (63.5°C). Can you explain this in terms of the differences in electronic structure?