Magnesium (Mg) naturally occurs in three stable isotopes, 24 Mg, 25 Mg, and 26 Mg. There are 19 radioisotopes that have been discovered, ranging from 19 Mg to 40 Mg. The longest-lived radioisotope is 28 Mg with a half-life of 20.915 hours. The lighter isotopes mostly decay to isotopes of sodium while the heavier isotopes decay to isotopes of aluminium. The shortest-lived is 39 Mg with a half-life shorter than 180 nanoseconds, or possibly 40 Mg, with a half-life longer than 170 nanoseconds (the half-life of 19 Mg is unknown). Standard atomic mass: 24.3050(6) u. A chart showing the abundances of the naturally-occurring isotopes of magnesium.
Another large shark, capable of growing to a length of over 16 feet, or 5 meters, the Tiger Shark can be found in the Caribbean and other warm waters around the world. They can have a blue to light green colour, combined with a white or light yellow belly.
Tigers are mainly found in many South Eastern Asian countries including China, Bangladesh, Siberia, and Indonesia, but the country where most are found is India. The most comm â¦ on colour of tigers is pink, blue and on the odd occastion green and purple.+ 26 others found this useful. Suresh Changotra. â¢ | The Javan (Panthera tigris sondaica) and Balinese (Panthera tigris balica) tigers are now extinct but were native to Bali and Java in Indonesia respectively. / â¢ | The Caspian tiger, now extinct, (Panthera tigris virgata) was historically found in Turkey through central and west Asia.