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.
During the Harding administration, a stop-gap immigration measure was passed by Congress in 1921 for the purpose of slowing the flood of immigrants entering the United States.A more thorough law was signed by President Coolidge in May 1924. It provided for the following: provision in the 1924 law barred entry to those ineligible for citizenship  effectively ending the immigration of all Asians into the United States and undermining the earlier Gentlemen`s Agreement with Japan.