Across
- 4. Noble gas used in advertising signs
- 5. contraction Cause of similar atomic radii of zirconium and hafnium
- 6. The lightest metal in the periodic table
- 7. The element used as the standard for atomic mass calculations
- 9. Highly reactive alkali metal stored under kerosene
- 11. Which element has the highest electrical conductivity
- 14. Element with the highest ionization enthalpy
- 15. The only liquid metal at room temperature
- 17. Metal extracted from bauxite ore
- 19. mass Arrangement of elements in Mendeleev’s periodic table was based on
Down
- 1. Naturally radioactive noble gas
- 2. Element showing anomalous electronic configuration 3d⁵4s¹
- 3. Least electronegative element
- 4. Scientist who proposed the Law of Octaves
- 8. The only liquid non-metal at room temperature
- 10. Element with the highest electron affinity
- 12. Most abundant element in the Earth’s crust
- 13. Element with atomic number 45
- 16. Element essential for chlorophyll formation in plants
- 18. Name one metalloid other than silicon and germanium