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).
The answer is triangular trade route
Answer:
Explanation:
A senator's term of office is six years and approximately one-third of the total membership of the Senate is elected every two years. Look up brief biographies of Senators from 1774 to the present in the Biographical Directory of the United States Congress.
With education, the common man would be able to select leaders wisely and fight back against the tyrannical instincts of those in power.
He would be able to understand, maintain, and protect his rights, so that government could not usurp authority and devolve into despotism.
Answer:
He made presidency de center of American politics.
Explanation:
He's kwon as the first moderns President. During his period, Congress gain more power, and Presidency as well.
All this happen through his decisive decisions, owning his authority. His philosophy was 'President has the right to use any and all power'.
Also, during his mandate, he develop responsibility to the people. He also believed that government has the right to regulate big businesses, this decisions had people consent, because he wanted to raise the economy participating in the Big Industries of the Country.
