PERIODIC LAW PUZZLE In this exercise, you will use your knowledge of periodic properties and a list of clues to arrange the main group (representative) elements into a periodic table. Use the clues below to identify the elements represented by the letters A-Z G is a noble gas U is an alkali metal E has 5 electrons in its outer energy level N has 2 valence electrons T has an outer electron configuration of 4s2 4p1 Q is a halogen M has a valence electron configuration of 4s2 4p4 W is a gas at room temperature F has the smallest atomic mass in its group P has the lowest ionization energy in its family Atoms of Z have 2 neutrons Atoms of D contain 10 protons The electrons of atom G are distributed over three energy levels H is the least metallic element in its group The atomic mass of V is less than that of J but more than that of N J has a lower ionization energy than V but a higher ionization energy than K The atomic number of R is one greater than that of Z Y is a liquid at room temperature whereas Q is a gas The atomic radius of S is greater than that of C A is more metallic than either O or E Atoms of K are larger than those of U T is more metallic than B X has an atomic number that is one less than that of G E is a gas at room temperature