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.
Passed by U.S. Congress in 1882 and signed into law by President chester a. arthur, the Chinese Exclusion Act (22 Stat. 58) created a ten-year Moratorium on the immigration of Chinese laborers into the United States.The Act represents the first law ever passed by Congress that denied entry to the United States on the basis of race or ethnicity.nder the provisions of the act, immigration of Chinese laborers to the United States was suspended for ten years. Chinese laborers already in the country were permitted to remain, even following temporary absences, but were barred from naturalization.