- Group 1: X (Period 5), Q (Period 4), By (Period 3), Ch (Period 2)
- Group 2: (empty Period 5), (empty Period 4), (empty Period 3), (empty Period 2)
- Group 13: E (Period 2), Yz (Period 3), (empty Period 4), (empty Period 5)
- Group 14: (empty Period 2), Hi (Period 3), T (Period 4), (empty Period 5)
- Group 15: (empty Period 2), (empty Period 3), Ss (Period 4), (empty Period 5)
- Group 16: (empty Period 2), (empty Period 3), (empty Period 4), (empty Period 5)
- Group 17: Kt (Period 2), A (Period 3), V (Period 4), (empty Period 5)
- Group 18: Bo (Period 2), L (Period 3), Wo (Period 4), (empty Period 5)
- Period 1: D (Group 1), Pf (Group 18)
- Period 5: Z (Group 1), Fx (Group 13), G (Group 14), Up (Group 15), El (Group 18)
Parent Tip: Review the logic above to help your child master the concept of alien periodic table worksheet answers.