Which element is used as the trendsetter element?

This question is incomplete

Explanation:

This question is incomplete. However, trendsetter elements can be described as the element in which other elements are compared to as regards to a particular property; this could be as a result of the element's distinct and absoluteness of such property or as a result of the element's neutrality of such property. For example, in the electrochemical series, hydrogen can be described as the trendsetter element because hydrogen as a standard reduction potential (E°) of 0.00, thus elements above hydrogen in the series are positively charged while those below hydrogen in the series are negatively charged.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.