Consider a mercury atom (z=80,A=200) a-) calculate its mass in kg
b-) how many atoms of mercury does a drop of mercury contain ?
mp=1.67×10-27 kg=mn
volume of a drop =0.05 ml
p mercury =13.6×10*3 kg. m*-3

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).

there are two significant figures.

more infor would

a lot

the answer is symmetrical : )