- 3 Across: Sodium (Na) → SODIUM
- 5 Across: Carbon (C) → CARBON
- 7 Across: Nitrogen (N) → NITROGEN
- 8 Across: Boron (B) → BORON
- 9 Across: Aluminum (Al) → ALUMINUM
- 14 Across: Beryllium (Be) → BERYLLIUM
- 15 Across: Helium (He) → HELIUM
- 16 Across: Fluorine (F) → FLUORINE
- 17 Across: Neon (Ne) → NEON
- 1 Down: Silicon (Si) → SILICON
- 2 Down: Argon (Ar) → ARGON
- 3 Down: Sulfur (S) → SULFUR
- 4 Down: Hydrogen (H) → HYDROGEN
- 6 Down: Phosphorus (P) → PHOSPHORUS
- 10 Down: Lithium (Li) → LITHIUM
- 11 Down: Magnesium (Mg) → MAGNESIUM
- 12 Down: Oxygen (O) → OXYGEN
- 13 Down: Chlorine (Cl) → CHLORINE
Parent Tip: Review the logic above to help your child master the concept of periodic table puzzle worksheet.