what's the difference between elements and concepts?
A concept is more or less the final form of an idea, which has been gone through the process of fine-tuning and pruning of its raw edges. Generally, when it is a concept, one can mentally see the startpoint, endpoint, and the development path of transition points in between from the standpoint of execution.
Elements and compounds are pure chemical substances found in nature. The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Examples of elements include iron, copper, hydrogen and oxygen. Examples of compounds include water (H2O) and salt (Sodium Chloride - NaCl)