What is the first element on the periodic table?

The first element on the periodic table is hydrogen. This is significant because the periodic table is organized by increasing atomic number, and hydrogen has the atomic number of 1. It is the simplest and most abundant element in the universe, consisting of only one proton and one electron. Its placement at the top of the table reflects its unique properties, such as being a non-metal and its ability to form bonds with a variety of other elements. Understanding hydrogen's position is foundational in chemistry, as it plays a crucial role in the formation of water and organic compounds, which are essential for life.