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.
United States federal law passed on May 6, 1882, following revisions made in 1880 to the Burlingame Treaty of 1868. Those revisions allowed the U.S. to suspend immigration, and Congress subsequently acted quickly to implement the suspension of Chinese immigration, a ban that was intended to last 10 years.nited States federal law passed on May 6, 1882, following revisions made in 1880 to the Burlingame Treaty of 1868. Those revisions allowed the U.S. to suspend immigration, and Congress subsequently acted quickly to implement the suspension of Chinese immigration, a ban that was intended to last 10 years.