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.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the right answer is c i just did the question.