Compounds that have the same molecular formula but different chemical structures are called isomers. Remember isomerism is a property between a pair (or more) of molecules, i.e. a molecule is an isomer of another molecule. A similar relationship is that of brother or sister...
Many Americans are up in arms. But in fact, keeping out desperate souls seeking entry into America has deep roots. On this day 100 years ago, the United States passed the strictest immigration law of its time: the Immigration Act of 1917. The law restricted the immigration of undesirables, including many people from the Middle East and Asia, through increased taxes, tests and outright bans.
WASHINGTON (AP) â Two presidents have acted unilaterally on immigration â and both were Republican. Ronald Reagan and his successor George H.W. Bush extended amnesty to family members who were not covered by the last major overhaul of immigration law in 1986. Neither faced the political uproar widely anticipated if and when President Barack Obama uses his executive authority to protect millions of immigrants from deportation.