to date Volcanics and older than a few million years.
The atomic radius of Sr (Strontium) is larger than that of Rb (Rubidium). This is because atomic radius generally increases down a group in the periodic table, and Sr is located below Rb in the same group.
In a geological isochron, SR stands for "slop ratio" and RB stands for "ratio of initial isotopes." SR represents the slope of the isochron line, which gives information about the age of the sample. RB refers to the initial isotopic composition of the sample, which helps in interpreting the geological history and processes.
1935 Jay Berwanger Chicago RB Sr.
1939 Nile Kinnick Iowa RB Sr.
this is an example of β radiation, n -> p + e Rb-87 -> Sr-87 + e (rem to write atomic numbers in, Rb is 37 and Sr is 38) The halflife 87Rb is 4,88.1010 years.
The energy sublevel being filled by the elements Rb (rubidium) to Sr (strontium) is the 5s sublevel. These elements are in the fifth period of the periodic table, and in period 5, the s sublevel starts to fill up with electrons.
Li, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Ba, Ra.
to rb
Rubidium (Rb) shares more similar properties with cesium (Cs) than with strontium (Sr). Both Rb and Cs are alkali metals, which means they have similar chemical properties, including high reactivity and the tendency to form +1 cations. In contrast, strontium is an alkaline earth metal, exhibiting different reactivity patterns and a +2 oxidation state. Thus, Rb is more closely related to Cs in terms of chemical behavior and properties.
Sr.
Dendrochronolgy would be useful for wooden objects, and radio-chronology for some minerals. (C14, Rb-Sr, U-U and so on). Thermo-luminescence for buried pottery or similar. Simple stratigraphy for alluvial deposits.
Leon Hart, a player that played offensive end and defensive end for Notre Dame, was the winner of the 1949 Heisman Trophy. He played eight seasons in the NFL with the Detroit Lions.