Would someone answer this question will be and also will pick ( be honest)

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)

Abnormal softening of a gland is known as

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?