The change in breastplates and helmets contribute to decline of the Roman Empire by weakening the the military. It weaken them because the removal of it promote laziness and negligence of training and the such. It also removes the protection against ranged weapons which caused many casualties.
Answer:
Explanation:
The purchase doubled the size of the United States, greatly strengthened the country materially and strategically, provided a powerful impetus to westward expansion, and confirmed the doctrine of implied powers of the federal Constitution.
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All isotopes have different
number of neutrons and hence different atomic masses. Also they have the same
electronic configuration and since the chemical properties are determined by
this configuration, they all have the same chemical properties; therefore the
answer is C)The all have the same number of protons.