To which group and period do the following elements belong?
a. Carbon (Z=6) Group= Period=
b. neon (Z=10) Group= Period=
c. aluminium (Z=13) Group= Period=
d. Phosphorous (Z=15) Group= Period=
e. Fluorine (Z=9) Group= Period=
f. sulphur(Z=21) Group= Period=
g. Argon(Z=18) Group= Period=

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).