Although bismuth-209 is now known to be unstable, it has classically been considered to be a stable isotope because it has a half-life of over 1.9Ã10 19 years, which is more than a billion (1000 million) times the age of the universe.ismuth (Bi) has no stable isotopes, but does have one very long-lived isotope; thus, the standard atomic mass can be given as 208.9803987(16) u.
Following through on his State of the Union pledge, President Barack Obama has signed an Executive Order raising the minimum wage for workers on new federal contracts to $10.10 per hour. The rate increase will apply only to solicitations and contracts issued on or after January 1, 2015.
2017 Highlights. 1  Voters in Arizona, Colorado, Maine, and Washington approved November ballot measures to raise their respective minimum wages. Arizona, Colorado, and Maine will incrementally increase their minimum wages to $12 an hour by 2020. Washington's will be increased incrementally to $13.50 an hour by 2020. New York became the second state to pass a new law that would raise the minimum wage in New York City to $15 per hour by the end of 2018.