I would say the answer is A. Dimitri made the modern periodic table, not chemical symbols, and generally compounds do not have the same properties, for example water which is made of 2 gases.
Answer:
They developed many new techniques for buildings and invented, concrete,roman roads, arches, and aqueducts
Explanation:
The union of independent sovereign states is a federation .
A service that only the Federal government can provide is the ability to mint money in the country.This is due to the fact that this single authority is bestowed upon the country by the constitution. Through the central bank of the country, the federal government mints money for the federation.A federal system of government exists when power is shared between a central, federal body, and smaller entities such as states.
The federal government has power over laws of the states and is established by Article 6 of the U.S. Constitution. The federal government has three branches: the legislative, executive, and judiciary, all are within its powers to exercise.
Read more on the powers of the federal government here:
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