It was suggested that, because of the jump in numbers, from chlorine to potassium, there was an element missing between them. Which element was discovered between these elements?

20 drops hope this

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? ?