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.
In judging whether immigration reform will succeed, it's helpful to know why so many past attempts by Congress and the White House to change the system have failed. Here's a timeline of the major attempts to deal with illegal immigration and why they didn't make the cut.* The Immigration Reform and Control Act of 1986: The amnesty law of 1986 passed through Congress and was signed by President Ronald Reagan, but it is largely considered a failure.n judging whether immigration reform will succeed, it's helpful to know why so many past attempts by Congress and the White House to change the system have failed. Here's a timeline of the major attempts to deal with illegal immigration and why they didn't make the cut.