Question

1. with luck, its possible to find a gold nugget in nature, but no one ever finds naturally occurring aluminum nuggets. which property determines whether a metal can be found in a pure state or only as an ore? a. density b. hardness c. reactivity d. abundance

Explanation:

The reactivity of a metal determines its tendency to form compounds. Gold has low reactivity, so it can exist in a pure state. Aluminum has high reactivity, so it exists as an ore (combined with other elements). Density (A) relates to mass per unit volume, hardness (B) is resistance to deformation, and abundance (D) is how much of an element is present. None of these directly determine pure - state vs ore existence like reactivity.

Answer:

C. reactivity