Hydrogen, Lithium, Sodium, Potassium, Rubidium, Caesium, Francium
1) Black codes were restrictive laws designed to limit the freedom of African Americans and ensure their availability as a cheap labor force after slavery was abolished during the Civil War.
2) Africans Americans were able to go to school and kinda live normal but still was treated horrible
<span>D. It was an ecological transformation.</span>
Columbian Exchange was the introduction of Old World plants and animals into the New World and the other way. An example of this was the introduction of tomatoes and potatoes to Europe.
