The metal that can be cut with a knife is _______.

Sodium metal can be easily cut with a knife. Sodium has a body-centered cubic structure. In this structure, the unit cell consists of 8 Na (sodium) atoms at the 8 corners and 1 atom at the center of the cube. Due to this structure, a lot of empty space is present in the unit cell. Also, the Na atom has one valence electron and a large size. The relatively weak metallic bonding in alkali metals makes them soft. Therefore, sodium can be easily cut with a knife. In general, alkali metals are soft metals and can be cut with a knife.