Question

some of the physical properties used to distinguish between the three groups are: • ____ = the ability of a substance to reflect light. usually the descriptive words are either ____________

Explanation:

The physical property that describes the ability of a substance to reflect light is luster. The common descriptive words for luster are metallic (for substances like metals that have a shiny, reflective appearance like gold, silver) and non - metallic (which can be further divided into sub - types like dull, glassy, pearly, etc., for substances like wood (dull), glass (glassy), pearls (pearly)).

Answer:

First blank: Luster; Second blank: metallic, non - metallic (or specific non - metallic terms like dull, glassy, pearly etc.)