What is the atomic number of the element Strontium?

The atomic number of an element is the number of protons present in the nucleus of its atom. In the case of strontium, the element with symbol Sr, its atomic number is 38 because the atom of strontium contains 38 protons in its nucleus. This number uniquely identifies the element and determines its position in the periodic table, providing information about its properties and behavior in chemical reactions.