Strontium is a metal in group IIA of the periodic table with atomic number 38, an atomic weight of 87.62, and a density of 2.6 Mg/m 3. Its melting point is 768 C, and it boils at 1380 C. The ...

The element strontium (chemical symbol, Sr) has an atomic number of 38 and four forms known as isotopes, ⁸⁴Sr, ⁸⁶Sr, ⁸⁷Sr and ⁸⁸Sr. Although these isotopes are stable, their ...

Conversely, the strontium nucleus has a non-zero spin – for the isotope strontium-87 this spin can take any of 10 values. But because the nucleus resides in the atom’s centre, inside many layers of ...

The strontium lattice clock sets new standards for precision and stability, only gaining or losing one second about every five billion years. Atomic clock performance can be measured by two key ...

"Strontium atomic clock sets new records in both precision and stability." ScienceDaily. ScienceDaily, 22 January 2014. <www.sciencedaily.com / releases / 2014 / 01 / 140122133831.htm>.

To find out how much damage mankind should expect from strontium 90, one of the fallout isotopes, the U.S. Atomic Energy Commission financed a study by Drs. J. Laurence Kulp, Walter R. Eckelmann ...

"Strontium atomic clock accurate to the second -- over 15 billion years." ScienceDaily. ScienceDaily, 21 April 2015. <www.sciencedaily.com / releases / 2015 / 04 / 150421132031.htm>.

Scientists from the University of Colorado Boulder have created an atomic clock using lasers and strontium atoms that’s incredibly accurate—only losing one second every 40 billion years.