If you mean those supposedly created by the large hadron collider, they last for a split second. Not long enough for them to attract another atom to them.
-
They evaporate in less than a nanosecond. That's a billionth of a second.
...Safety argumentsMain article: Safety of particle collisions at the Large Hadron Collider
Hawking's calculation[6] and more general quantum mechanical arguments predict that micro black holes evaporate almost instantaneously. Additional safety arguments beyond those based on Hawking radiation were given in the paper,[19][20] which showed that in hypothetical scenarios with stable black holes that could damage Earth, such black holes would have been produced by cosmic rays and would have already destroyed known astronomical objects such as the Earth, Sun, neutron stars, or white dwarfs. Further, microscopic black holes generated from a particle accelerator are very small in size and are expected to have a high velocity[citation needed], making it impossible[citation needed] for them to accrete a dangerously large amount of mass before leaving the earth for good.
Black holes in quantum theories of gravityIt is possible, in some theories of quantum gravity, to calculate the quantum corrections to ordinary, classical black holes. Contrarily to conventional black holes which are solutions of gravitational field equations of the general theory of relativity, quantum gravity black holes incorporate quantum gravity effects in the vicinity of the origin, where classically a curvature singularity occurs. According to the theory employed to model quantum gravity effects, there are different kinds of quantum gravity black holes, namely loop quantum black holes, noncommutative black holes, asympotically safe black holes. In these approaches black holes are singularity free. ..."
http://en.wikipedia.org/wiki/Micro_black…
...Safety argumentsMain article: Safety of particle collisions at the Large Hadron Collider
Hawking's calculation[6] and more general quantum mechanical arguments predict that micro black holes evaporate almost instantaneously. Additional safety arguments beyond those based on Hawking radiation were given in the paper,[19][20] which showed that in hypothetical scenarios with stable black holes that could damage Earth, such black holes would have been produced by cosmic rays and would have already destroyed known astronomical objects such as the Earth, Sun, neutron stars, or white dwarfs. Further, microscopic black holes generated from a particle accelerator are very small in size and are expected to have a high velocity[citation needed], making it impossible[citation needed] for them to accrete a dangerously large amount of mass before leaving the earth for good.
Black holes in quantum theories of gravityIt is possible, in some theories of quantum gravity, to calculate the quantum corrections to ordinary, classical black holes. Contrarily to conventional black holes which are solutions of gravitational field equations of the general theory of relativity, quantum gravity black holes incorporate quantum gravity effects in the vicinity of the origin, where classically a curvature singularity occurs. According to the theory employed to model quantum gravity effects, there are different kinds of quantum gravity black holes, namely loop quantum black holes, noncommutative black holes, asympotically safe black holes. In these approaches black holes are singularity free. ..."
http://en.wikipedia.org/wiki/Micro_black…
-
The lifetime of a black hole with the mass of our sun is 2 x 10^67 years.
The sun's mass is 1.99 x 10^30 kg. Lifetime is proportional to mass cubed. So a black hole with 1% of the sun's mass lives for 10^-6 as long = 2 x 10^61 years.
A BH of 10^11 kg would have a lifetime about equal to the present age of the universe, and a BH of 1 billion kg (10^9) would last 13,500 years.
The sun's mass is 1.99 x 10^30 kg. Lifetime is proportional to mass cubed. So a black hole with 1% of the sun's mass lives for 10^-6 as long = 2 x 10^61 years.
A BH of 10^11 kg would have a lifetime about equal to the present age of the universe, and a BH of 1 billion kg (10^9) would last 13,500 years.
-
well im not sure, but id guess forever
i dont think black holes "die" they just grow bigger as they accumulate more mass, so id imagine tinier black holes behave in the same manner
i dont think black holes "die" they just grow bigger as they accumulate more mass, so id imagine tinier black holes behave in the same manner