A periodic table of elements with a group of elements highlighted in the center. The table is divided into rows and columns, with each element represented by a symbol and its atomic number. The elements are arranged in a way that shows their periodic trends and relationships. The highlighted group includes elements such as Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, M