What is the smallest packet of electromagnetic energy that can be absorbed or emitted?

Photons  is the smallest packet of electromagnetic energy that can be absorbed or emitted.

Explanation:

Photons

The energy packets of the electromagnetic radiation that can be either absorbed or emitted.these are particles which transmit light into space.

There energy of the photon is given by Planck's equation:

where,

E = energy of photon = ?

h = Planck's constant =

c = speed of light =

= frequency of the photon

= wavelength light emitted by photon

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).