Russia will be decisively countering attempts to use the UN Security Council for legitimizing external interference, including military interference, in the internal affairs of states in circumvention of the UN Charter and putting political pressure from the UN Security Council on "unwanted" regimes, including under the pretext of protecting civilians.4.
It naturally has different concentrations of Rb and Sr in different parts of the rock because these don’t necessarily mix perfectly. Once it cools all the way and crystallizes, it is considered "born" and atoms can no longer come in or out of the system.