Question

What ions do strontium and calcium metal commonly form?

Answer 1

Where do `"strontium"` and `"calcium"` metal lie in the Periodic Table?

Explanation:

Both metals are alkaline earths; they lie in Group 2 of the Periodic Table. Because the modern Periodic Table reflects electronic structure, each metal has 2 valence electrons. And thus (i) upon oxidation they commonly form `M^(2+)` ions; and (ii) the chemistry of both metals should be to a first approximation similar.

The isotope `""^90Sr` is a radioactive isotope with a short half-life, and this is a dangerous isotope in that it can replace calcium in the human body and cause radioactive poisoning.