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.
An immigration reform bill passed by the Senate in June did not set the costs of the proposed 13-year path to citizenship. Lawmakers left that up to U.S. Citizenship and Immigration Services, with the idea that fees would make the system self-sustaining. While the fees remain unspecified, the Senate bill lays out penalties totaling $2,000 to be paid at various steps along the way.