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Well for this questions the method used by scientist are tecnicaly different than others well most suit of what atoms they could find in their place so its easier. But most do say that they put a chemical and if it bubbles its a mixture and if their are no ubble it is a pure substance
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What element had not been discovered in the middle ages?
The people of the middle ages mostly believed in four elements: fire, earth, air, and water. Arsenic, antimony, and bismuth were discovered in the middle ages, but medieval people did not know they were elements any more than they knew that gold, copper, iron, and silver were elements. The idea of actual chemical elements was something that came later.
Spartacus what nationality is the name?
The name "Spartacus" is a Latin name. It had no nationality as such. The rebel gladiator Spartacus was said to be from Thrace and also was said to have served in the Roman army. Many auxiliaries either Latinized their names or changed them completely to a Latin (Roman) name.
When was the first wheel used?
Wheels are known to have been used in ancient Mesopotamia from the third millennium BC, about 5,000 years ago. Prehistoric wheels may have existed, but no remains have been found.
Which civilization believed in the mandate of heaven?
shang
When was it believed that humankind began?
more than 3 million years ago which was when Lucy, an adult female humanoid was found, but some scientists believe humankind started to separate from apes about 6 million years ago. however homo-sapiens (that's us) were only found at 200,000 years ago (NOT THAT LONG AGO COMPARED TO THE MILLIONS OF YEARS before we existed).
