What is the periodic table based on? 1. the mass of atoms.2. the charge of atoms.3. the structure of atoms.4. the color of atoms.

The periodic table was organised by Russian chemist Dmitri Mendeleev and grouped each element with similar properties and atomic mass. He left gaps in the periodic table for undiscovered elements.

So, 1. The mass of elements is the correct answer

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? ?

2b2t

explanation:

2b2t