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.
Illegal Immigration and the IRCA of 1986. Immigration legislation focusing on illegal immigration was considered and passed by the 99th Congress, and enacted as the Immigration Reform and Control Act (IRCA) of 1986 P.L. 99-603 (November 6, 1986; 100 Stat.ongress enacted the first significant federal legislation relating specifically to immigration. Among its provisions, it: (1) established the continuing reporting of immigration to the United States; and (2) set specific sustenance rules for passengers of ships leaving U.S. ports for Europe.