Across
- 4. This is a semi-metal or a metalloid. This is the element responsible for severe poisoning of millions of Bangladeshis and Indians because of the presence of this element in Ganges and Brhamapurtra.
- 8. This law for the systemic classification of the element was given by John Newlands
- 9. The property of the elements to attract the electrons in a bond.
- 11. This is a effect which leads to the fall in the effective nuclear charge due to the interelectronic repulsion of the core electrons.
- 14. This is the IUPAC name given to the element by the country that made the first artificial satellite
- 16. Surname of the scientist who believed that the modern periodic table is one of the most important discoveries on the field of chemistry.
- 18. This is special category of the elements that includes Fe, Cu, Ag, V , Ti etc. They all show multiple oxidation states, they all are paramagnetic in their pure or oxidized state and they all are very widely used in catalysis.
- 19. This is the name of the group which have elements like Oxygen and Suphur.
- 21. The element is named after one of the greatest Physicist ever whose teachers thought he would never do anything in his life
- 23. The radioactive gas that belongs to the family with the highest first Ionization enthalpy
- 25. The ion of this element is widely used in the batteries. This is the first member of Alkali family
- 26. This was called as Eka-Aluminium. This metal starts melting as soon you as you take it in your hand.
Down
- 1. The radioactive element that belongs to the last period and first group. The name relates to an European country
- 2. This is the element which can never exist in positive oxidation state.
- 3. He gave one of the electronegativity scale and the concept of molecular bond. The name comes from a hindi name of an Indian vegetable used to make raitas, salads and parathas.
- 5. this is the last element of the Alkali family and is used in the photoelectric effect. This also has the lowest ionization enthalpy in the Alkali family.
- 6. He was the first one to arrange elements periodically in the form of triads
- 7. The radioactive element which was discovered by the Scientist who holds the honour of being the only person to receive Nobel prize both for Chemistry and Physics.
- 10. He was the first one to arrange the elements periodically
- 12. The element that is a very important component of bleaching powder. It is also used as disinfectant in the purification of water. This has the highest value of the electron gain enthalpy.
- 13. This is the group of elements that are made by the bombardment of neutrons over Uranium. They are all radioactive
- 15. This element has the highest first Ionization enthalpy
- 17. The name of the group comes from the ability of the elements to form salts
- 20. Again we have this element that shares its name with a very powerful European country. This is also a semi-metal predicted by Mendeleev
- 22. He is the scientist who published his periodic table just after Mendeleev. He belonged to Deutschland
- 24. Surname of one of the greatest Chemist who got two Nobel Prize and gave one of the Electronegativity scale.