Alien Periodic Table Use these clues to put the alien elements on the alien periodic table. 1. Noble gases are B, L, W, and J. B is the lightest. W is the heaviest. L is in period 2. 2. The lightest element on the table is A. 3. All the following elements are in period 3. The number of valence electrons are @-1, Z-2, Y-3, H-4, M-5, O-6, and K-7. 4. G has 7 electrons. 5. X and C are in group 1. X is the heaviest element in group 1. 6. S is the heaviest element in group 5. 7. I and V are halogens. I is lighter than V. 8. # has the same number of valence electrons as Z. 9. N has 8 protons. 10. Q has only 1 electron in its outer level and is in period 4. 11. $ is the heaviest of all atoms. 12. P is in period 5 and is an alkaline earth metal. 13. D is in period 4 and has 2 valence electrons. 14. F is like our element carbon. It is in the same family as H, T, and $. 15. U is in the same group as N. 16. E, R, and % are in group 3. % is the heaviest and E is the lightest in the group.