Are halogens components in these devices

Elements such as fluorine, chlorine, bromine, iodine and astate are halogens and appear in the seventh main group in the periodic table of the elements. Add halogen lamps to the list, and the answer becomes more clear: All involve one or more of the halogens, which form Group 7 of the periodic table, which ... ... halogens according to their position in the periodic table belong to Group VIIA, which means they have seven valence electrons and need an additional ... Page 1. 1. H. Hydrogen. 1.008. 11. Na. Sodium. 22.989. 19. K. Potassium. 39.098. 37. Rb. Rubidium. 85.468. 55. Cs. Cesium. 132.905. 87. Fr. Francium. The elements fluorine, chlorine, bromine, iodine, and astatine form a group or family in the Periodic Table known as the halogens (salt formers). This group contains fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Halogens have seven valence electrons and usually form anions with ... Dimitri Mendeleev (1834- 1907) invented the first periodic table. He arranged the elements by their increasing atomic masses. Elements with similar properties ... Alkali metals and halogens belongs to group 1A of the periodic table and group 17 respectively. Read more for further details. Jun 19, 2021 ... The halogens are a group of elements found in group 17 of the periodic table. Their name means salt-producer, and they are the most reactive non-metal elements. Halogens on the Right ... In the second column from the right side of the periodic table, you will find Group Seventeen (Group XVII). This column is the home of ...