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.
List of What's Allowed on Planes and What Is Banned. WASHINGTON â The government's ban on liquids and gels in airliner passenger cabins is confusing travelers. Further complicating matters is a carry-on ban on some trans-Atlantic flights. The restrictions are part of tighter airline security ordered by the U.S. and British governments in the wake of a foiled terror plot involving liquid explosives.