Answer:
15
Explanation:
Atomic mass refers to the sum of protons and neutrons in the nucleus of an atom. So protons are 7and neutrons 8. 7+8=15
What are the statements for the question?
In 1776, the Thirteen Colonies declared their independence from Britain. With the help of France and Spain, they defeated the British in the American Revolutionary War. In the Treaty of Paris (1783), Britain officially recognized the independence of the United States of America.
Answer:
The first person in American was probably a Native American who crossed the land bridge.
Answer:
The real causes of World War I included politics, secret alliances, imperialism, and nationalistic pride. However, there was one single event, the assassination of Archduke Ferdinand of Austria, which started a chain of events leading to war.
Explanation:
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