A more electronegative atom... Compounds are pure substances that are combinations of two or more elements. The most basic unit of a compound is the molecule, which is a combination of two or more atoms of different elements. Different elements have different properties, and hence, form different kinds of compounds.
Charcoal is added to orchid mix with the intention of keeping the mix sweet and to filter impurities. The particle size of this charcoal is perfect for the majority of orchid mixes and a little goes a long way. This medium charcoal is an ingredient in many orchid mixes.The particle size of this charcoal can very from 1/2 to 1 inch. Charcoal is not finely graded and some smaller and larger pieces may be mixed in.his medium charcoal is an ingredient in many orchid mixes. The particle size of this charcoal can very from 1/2 to 1 inch. Charcoal is not finely graded and some smaller and larger pieces may be mixed in.
If your orchid is a Dendrobium type, trimming is a little different. Trim the flowers off as they fade but leave the stem. Next year it will flower on the same stalk. Trim roots and re-pot as normal. If there are any places on the stalk that have turned yellow or brown, cut them back completely so that the plant will grow back healthier. 2  Remove the orchid from its pot. 3  Prune away any dead or damaged roots. 4  Replant the orchid in a bigger pot each year so that it has more room to grow.