Which electrode gets heavier in an electrolytic cell?

Apart of the periodic table is shown. a portion of the sixteenth and seventeenth columns of the periodic table is shown. column 16 reads eight oxygen, 16 sulfur, and 34 selenium. column 17 reads nine flourine, 17 chlorine, and 35 bromine. which of the following elements is less reactive than the others? bromine (br) oxygen (o) selenium (se) sulfur (s)

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.