Of the following compounds: 1. gold 2. mercury 3. Ag 4. W 5. Li 6. Be 7. nickel 8. oxygen When involved in an ionic compound the elements which have multiple charges and therefore must be indicated in Roman numerals (in ascending order) are: (Example: metal (V) non- metal)

Nickel

Explanation:

Transition metals

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).