The element that has 20 protons is Calcium (Ca). In the periodic table, the number of protons in an atom’s nucleus defines the element. Since Calcium is the 20th element, it has 20 protons in its atomic structure.
This characteristic is crucial because it determines the element’s identity and its position in the periodic table. Calcium is an alkaline earth metal, and it plays a vital role in biological systems, particularly in bone formation and cellular processes.