What Electronic arrangement of strontium?

The electronic arrangement of strontium (Sr), which has an atomic number of 38, is [Kr] 5s². This means that strontium has two electrons in its outermost shell (the 5s orbital) after the noble gas krypton (Kr), which represents the filled inner shells. As a result, strontium is classified as an alkaline earth metal, known for its reactivity and tendency to form +2 ions.