The Periodic Table Jumbo Crossword

Across 1. Group 0 is called the ______(5,5) 2. A metal that burns with a pink/purple flame (9) 3. An element in group 2 which burns with a bright white 5. A gas with one proton (8) flame (9) 8. A gas with 8 protons (6) 4. Element in group 1 with 3 protons (7) 11. Group 7 is called the ______(8) 6. The name for an isotope of hydrogen with 2 neutrons 14. The ______metals occupy the central block of the (9) Periodic Table (10) 7. The number of electrons ______across a period (9) 17. A metal which forms 3+ ions (9) 9. Element in group 1 with mass number 23 (6) 18. ______atomic mass (8) 10. The inventor of the Periodic Table (9) 19. Group 1 is called the ______metals (6) 12. The proton number is also called the ______number 21. A practical use for the colours of metal salts (6) 13. A member of group 7 that exists as 2 isotopes (8) 15. The halogens form ______ions (8) 16. The name for the rows in the Periodic Table (6) 20. The name for the columns of elements in the Periodic Table (5) 21. The most reactive element in group 7 (8) Down Periodic Table Crossword Grid