"Nuclear atom" or "planetary model of the atom".
1)a
2)a
The passage talks about multi tribal groups and its common that the Natives would get enslaved to better the agricultural system for Spaniards.
Hope this helped!
Answer:
The Vietnam War had a profound effect on America. The war also drastically decreased Americans' trust in political leaders. In foreign policy, the U.S. suffered from the so-called Vietnam Syndrome: a fear of getting involved in foreign ground wars that might become long, bloody stalemates with no foreseeable end.