interesting facts about gold
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| interesting facts about gold |
Gold has always fascinated people, due to its scarcity, but also for some other characteristics, such as that it never oxidize.
Below you will find some less well-known facts about gold. Compared to other metals, gold is much softer.
One can beat 1 gram of gold to a 1 square meter sheet and light would shine through that sheet. very few chemicals can attack gold, so that's why it keeps it sine even when buried for 1000's of years.
A total of eighty-eight thousand tons of gold have been extracted from earth ever since. this means all the gold that has been dug up so far in history would, if melted, make a cube measuring approximately 25*25*25 meters.
75% of all gold ever produce has been extracted since 1910; much of the gold mined throughout history is still in circulation in one form or another. Gold is very rare compared with diamonds.
Gold has only one stable isotope,
Au, which is also its only naturally occurring isotope, so gold is both a mononuclidic and monoisotopic element. Thirty-six radioisotopes have been synthesized, ranging in atomic mass from 169 to 205. The most stable of these is
Au with a half-life of 186.1 days. The least stable is 171
Au, which decays by proton emission with a half-life of 30 µs. Most of gold's radioisotopes with atomic masses below 197 decay by some combination of proton emission, α decay, and β+ decay. The exceptions are 195
Au, which decays by electron capture, and 196
Au, which decays most often by electron capture (93%) with a minor β− decay path (7%). All of gold's radioisotopes with atomic masses above 197 decay by β− decay.
Au, which is also its only naturally occurring isotope, so gold is both a mononuclidic and monoisotopic element. Thirty-six radioisotopes have been synthesized, ranging in atomic mass from 169 to 205. The most stable of these is
Au with a half-life of 186.1 days. The least stable is 171
Au, which decays by proton emission with a half-life of 30 µs. Most of gold's radioisotopes with atomic masses below 197 decay by some combination of proton emission, α decay, and β+ decay. The exceptions are 195
Au, which decays by electron capture, and 196
Au, which decays most often by electron capture (93%) with a minor β− decay path (7%). All of gold's radioisotopes with atomic masses above 197 decay by β− decay.
At least 32 nuclear isomers have also been characterized, ranging in atomic mass from 170 to 200. Within that range, only 178
Au, 180
Au, 181
Au, 182
Au, and 188
Au do not have isomers. Gold's most stable isomer is 198m2
Au with a half-life of 2.27 days. Gold's least stable isomer is 177m2
Au with a half-life of only 7 ns. 184m1
Au has three decay paths: β+ decay, isomeric transition, and alpha decay. No other isomer or isotope of gold has three decay paths.
Au, 180
Au, 181
Au, 182
Au, and 188
Au do not have isomers. Gold's most stable isomer is 198m2
Au with a half-life of 2.27 days. Gold's least stable isomer is 177m2
Au with a half-life of only 7 ns. 184m1
Au has three decay paths: β+ decay, isomeric transition, and alpha decay. No other isomer or isotope of gold has three decay paths.
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