An entire group of elements was unknown when the periodic table was first developed because they were unreactive and no known compounds were composed of them. what most likely led to the inclusion of these elements in the periodic table? the formation of a compound in the laboratory new technology that showed how to identify one of the elements improvements in instruments to measure small masses more careful experiments to create synthetic elements
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Chemistry, 22.06.2019 22:50, kanerobertrosss2213
At the current rate, a graph of carbon dioxide produced by fossil fuels over time would slope upward slope downward be horizontal be vertical
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