1. Discovery of the elements Radium and Polonium
<span>2. Marie: First woman to be awarded the Nobel Prize </span>
<span>3. Discovered that pitchblende had more radioactivity than the isolated elements polonium and radium </span>
<span>4. Marie: Assisted with making portable x-ray machines, dubbed "Little Curies." </span>
<span>5. Marie: Took over her late husband's job as a professor.</span>
A push factor is best defined as something that causes people to leave their country. any legal restriction on immigration. any hardship immigrants face in a new country.something that makes people want to leave a place or escape from a particular situation: Instead of a fruitless attempt to eliminate illegal immigration, rich countries could focus on reducing the push factors that force some to flee - chiefly poverty and persecution. Compare. pull factor.
Because it was the capital of the Byzantine empire and wealth came from trading and its location also helped because it had access to trading routes on sea and by land.
Answer:
Knights were mounted warriors of the middle ages who were heavy armor. They practiced chivalry, the code of conduct they were expected to follow.
Explanation: