What is the total number of valence electrons in an atom with the electron configuration 1s2 2s2 2p6 3s2 3p3

the answer for sodium is 0.186

the answer for rubidium is 0.251

let that person have a turn to speak : )

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

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? ?