Look at the image shown
: f
what does this image represent?
linear molecule with one domain
linear molecule with two domains
tetrahedral molecule with four domains
trigonal planar molecule with three domains

Explanation:

It is known that an electron pair represents a domain. Hybridization of will be calculated as follows.

       Hybridization =

Valence electrons of boron are 3 and no. of bonded atoms in a molecule is 3.

Therefore, calculate hybridization of as follows.

          Hybridization =

                              =

                               = 3

Hence, hybridization of is , that is, trigonal planar.

Thus, we can conclude that the given image represents that it is a trigonal planar molecule with three domains.        

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).