What physical property makes wax good for making molds for making sculptures

Explanation:

Malleability is a physical property that allows the material to deformed without  cracking. Thanks top this property, you can obtain very thins layer of some materials like wax. People often confuse this with ductilibility, but the difference is that the last one are forced to make threads of the material.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell