Lesson 14: Isotopia: Which elements are likely to have radioactive isoto A) Elements 1-20 (smaller mass elements)
B) Elements 21- 80 (medium mass elements)
C) Elements 81 and bigger (larger mass elements)
D) All Elements

Explanation:

element1-20(smallet mass element (

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).