... the Ionic Radius of Strontium.
[b] Explain your reasoning.
Answer [a] 112 pm ?? -------- based on what is this calculated or predicted??
[b] A Strontium atom [2,8,18,8,2] with 5 occupied electron shells loses 2 electrons to form a Strontium ion [2,8,18,8] with 4 occupied shells
I can't understand how do we predict that the Ionic Radius is 112pm<--- based on the given information that element Strontium's Atomic Radius is 215pm.
Do we use the Half of the bond length between two homonuclear atoms formula r = (AB)/2 ?? However, 215pm/2 = 107.5pm ... Do I misunderstood the formula??