The valence of strontium is 2+.
The electronegativity of strontium is 0,95.
Both are situated in the group 2 of the periodic table.
They all have the same chemical properties.
beryllium
Strontium hydroxide is Sr(OH)2.
strontium sulfide
Strontium is an alkaline earth metal, and as such, has 2 valence electrons, and will react in a 1:1 ratio with oxygen. Both these characteristics are chemical properties.
The chemical properties of calcium are most similar to (in between) the chemical properties of magnesium and strontium.
Strontium and iodine are very different chemical elements.
Both are situated in the group 2 of the periodic table.
They all have the same chemical properties.
Astatine is a heavy halogen; no similarities with strontium (alkaline earth metal).
They have the same number of protons (and of electrons) and so their chemical properties are the same.
beryllium
The chemical formula of strontium arsenate is Sr3(AsO4)2.
The chemical formula for strontium oxide is SrO
This is the chemical formula for strontium hydroxide.
magnesium and strontium