Across
- 3. The center of an atom
- 5. The second element in the periodic table
- 8. Number of protons in an element's nucleus
- 11. Second element in group 14; Element used in computer chips
- 12. Lead's symbol
- 13. Element essential for respiration or breathing
- 14. Alkali metal with atomic number 19, symbol K
- 17. the smallest building blocks of matter and make up everything around us
- 18. Metal used in jewelry, symbol Ag
- 19. A vertical column on the periodic table
- 22. The element that has 12 protons
- 24. 27 electrons
- 25. Metal with high electrical conductivity, symbol Cu
- 26. What is the atomic mass of carbon? Round to nearest whole number
- 28. Element that makes up 78% of Earth's atmosphere
- 30. Average mass of an element's atoms
- 31. Atomic number of caesium
- 33. Gas used in bright signs, found in Group 18
Down
- 1. Copper's symbol
- 2. Noble gas with atomic number 54
- 4. Atomic mass of less than 2 amu; H is its symbol
- 6. Negatively charged subatomic particle
- 7. Soft metal in salt, symbol Na
- 9. Element used to make steel, symbol Fe
- 10. Four protons
- 12. Positively charged particle in an atom's nucleus
- 15. Symbol for a precious metal known as gold
- 16. Element found in all organic life, atomic number 6
- 19. Precious metal, symbol Au
- 20. A horizontal row on the periodic table
- 21. Group number 14, period 6
- 23. Metal commonly used in foil and cans
- 27. Metal used in batteries, atomic number 3
- 28. Subatomic particle with no charge
- 29. Radioactive element used in nuclear power; 92 electrons
- 32. Period 6, group 5