Based on the information in the table, which elements are most likely in the same periods of the periodic table? Facts about Five Elements Element Atomic mass amu Total electrons Valence electrons Year isolated Aluminum Al 27 13 3 1825 Boron cap b 11 5 3 1808 Carbon cap c 12 6 4 1803 Gallium Ga 70 31 3 1875 Germanium Ge 73 32 4 1886