funchem2

• matter 


  anything that has mass or volume
• elements

  a substance made up of only one type of atom
• atom


  smallest unit into which matter can be divided
• mass number


  total number of protons and neutrons in a nucleus
• atomic number 


  number of protons in the nucleus of an atom
• isotope


  same number of protons but different number of neutrons
• oxygen function in the body

  cellular respiration
• carbon function in the body 


  backbone of organic compounds
• hydrogen 


  components of organic compounds, acid-base balance
• nitrogen


  components of proteins, nucleic acids, cell membranes
• number of neutrons

  mass number - atomic number
• technetium-99 


  used to obtain images of liver, heart, lungs
• iodine-131


  used to measure thyroid activity
• iodine-125 


  used to get images of thyroid gland
• sodium-24 


  used to detect blockages in the circulatory system
• helium-3 


  MRI image of lungs