For isoelectronic ions, how are effective nuclear charge and ionic radius related? a) as nuclear charge (z) increases, ionic radius increases. b) as nuclear charge (z) increases, ionic radius decreases.

Therefore, correct option is B.

Explanation:

For isoelectronic ions : As the nuclear charge increases the atomic radius decreases due to increase in the attractive force on the outermost electrons.

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).