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
<span><span>it is Franklin D. Roosevelt who attempted to expand it.</span></span>
During the 17th and 18th centuries, the frontier for the British colonies of North Americas could usually be found at the "<span>b. Appalachian Mountains" since this was the area that most settlers were not inclined to pass.</span>
Answer:
The Answer is B
Explanation: I took the edgenity test, plus most of what Colombus states isn't true
