Across
- 3. most metallic element
- 6. the central part of the atom
- 11. to which element group does argon belong
- 13. negatively charged ions
- 14. the name of the element with the symbol "w"
- 15. name of the columns of the elements
- 17. the only element in the halide family that is liquid
- 18. surname of inventor of the modern periodic table
- 19. has the atomic mass number 24
Down
- 1. the heaviest metal on the chart
- 2. which element is the number 12 on the periodic table
- 4. the lightest weight metalloids
- 5. surname of who arrange the known elements in order of decreasing mass
- 7. which element is the number 14 on the periodic table
- 8. state of the matter of element calcium
- 9. what is the "ar" symbol for
- 10. first chemical element on the periodic table
- 12. most conductive metal element
- 16. a gas with 8 protons and 8 neutrons
- 18. most of the chemical elements on the periodic table