CONTENTS. After a radioactive nucleus undergoes an isobaric transition (beta emission, positron emission, or electron capture), it usually contains too much energy to be in its final stable or daughter state. Nuclei in these intermediate and final states are isomers, since they have the same atomic and mass numbers.
In the fall, it was widely reported that people from four U.S. states may need a passport to fly domestically this year. Now, the Department of Homeland Security has increased the list of U.S. locations not offering state driverâs licenses that comply with new federal regulations known as the Real ID Act.
Minnesota lawmakers decided not to in 2009. But since 2014, the state has given residents the option to voluntarily comply with the new federal Real ID requirements, with what the state calls an enhanced driver's license, or EDL. And it offers some idea of what's to come for Minnesotans if the feds crack down on the current state IDs.