Which are methods of reducing exposure to ionizing radiation? Check all that apply.
using a lead apron during medical X-rays
picking up radioactive material by hand to avoid dropping it
taking an X-ray image of large areas of the body at once
using a short burst of X-rays to take an image
taking an image of the smallest possible area

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)

The first amino acid of a new polypeptide chain is

Onsider the paragraph above. what is one chemical property of water? a) water is a polar molecule. b) water is the universal solvent. c) water reacts with group 1 metals. d) water has a high specific heat capacity.