If an atom has a mass number equals 39 and the number of neutrons equal 20, then
the atomic number
of electrons

h let me think

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

can you list the answers so i can 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? ?