Give the masses of the three most abundant Br2O molecules

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter