George Washington was the 1st president❤️
Upper Class: Priests, Government Officials, and Warriors
Middle Class: Farmers, Artisans, and Craftspeople
Bottom Class: Slaves
<h2>Answer: Marie Curie
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Marie Curie's notebooks, as well as all of her belongings, including her clothes, were contaminated with ionizing radiation. In fact, those of her husband also, because this couple of scientists discovered the radioactivity of several elements, helping the advance of science, but <u>did not know about the consequences of dealing with these materials without adequate protection.
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It should be noted that Curie's notes are stored in the basements of the National Library of France, stored in thick lead boxes and those who wish to access these documents must follow the appropriate protocol to treat radioactive material, wear appropriate clothing and sign a responsibility agreement before allowing them to review the documents.
Answer:
those are two groups which both came to united state from Europe they were searching for an improved economic "opportunities "
Explanation:
old immigrants come from central and Europe. and the new immigrants come from southern Europe
The answer is number four, land
