Marie Curie studied the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered was also radioactive. She also found out that:
- you can exactly measure the strength of the radiation from uranium;
- the intensity of the radiation is proportional to the amount of uranium or thorium in the compound - no matter what compound it is;
- the ability to emit radiation does not depend on the arrangement of the atoms in a molecule; it must be linked to the interior of the atom itself - a revolutionary discovery!
When she realized that some uranium and/or thorium compounds had stronger radiation than uranium, she made the following hypothesis: there must be an unknown element in the compound which had a stronger radiation than uranium or thorium. Her work aroused the interest of her husband, Pierre Curie, who stopped his own research on crystals and joined the "detective work" with his wife. And Marie was proven right: in 1898 the Curies discovered two new radioactive elements: radium (named after the Latin word for ray) and polonium (named after Marie's home country, Poland).
Answer:
be scattering of the Jewish people
Explanation:
Diaspora, the dispersion of Jews among the Gentiles after the Babylonian Exile or the aggregate of Jewish communities scattered 'in exile' outside ...
The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states on the status of territories acquired during the Mexican–American War (1846–1848).
1) that neutrality was neither possible any longer nor beneficial
2) that the US would make the world safe for democracy
3) a call for a league of nations
4) that the US had no quarrel with the German people, only their government.
Answer:
Throughout the medieval period, it was believed that the only way to keep order was to make sure that the people were scared of the punishments given for crimes committed. For this reason, all crimes from stealing to burglary of houses to murder had harsh punishments.
Explanation:
