Periodic Table, Halides Circled (IMAGE) DOE/Argonne National Laboratory Caption The periodic table of elements, organized by number of proteins, group and by column. Row 17 (circled) shows the halides used in Luo’s experiment. Credit (Image by Argonne National Laboratory.) Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.