What was the importance of mendeleev's periodic table to chemists?
it determined the mass of every known element.
it define an element.
it provided a pattern of repeating properties for the elements.
it scientists discover previously unknown elements.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

What conclusion can you draw from this experiment about the components of the black ink?

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands