Respuesta :
Strontium and barium have similar chemical properties because atoms of these elements have the same number of valency electron.
Strontium and barium belong to the same group in the periodic table. Element in the same group have the same number of valency electron.
The valency electron is the electron in the outermost shell of an atom. This valency electron(s) determines the chemical properties an atom possess.
Therefore, Strontium and barium having similar chemical properties is because of the atoms of these elements having the same number of valency electrons.
The valency electron strontium and barium are the same and this is what contribute to their similar chemical properties.
learn more on valency here: https://brainly.com/question/20728432?referrer=searchResults
