Periodic Table (Group 3A)

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Across
  1. 3. highest standard enthalpy of atomization of the elements
  2. 4. in aqueous solution, H3BO3 behaves as a--------- acid
  3. 6. Soft heavy metal melts at 30 degree celsius and is used in making heat sensitive thermometers the metal is-----------
  4. 7. aluminum is an-------------- oxide
  5. 9. Aluminium has a great affinity for oxygen and its oxidation is an exothermic process. This fact is made use of in----------------- welding
  6. 11. +1 oxidation number is important for this element
  7. 12. [BO3]3 --electronic
  8. 14. aluminium has vacant d-orbitals and can form a ------
  9. 15. glass is a --------------liquid
  10. 16. In the 11B and 11B{1H} NMR spectra respectively, you would observe an------and a singlet
Down
  1. 1. only element that reacts directly with N2 when heated to form a nitride
  2. 2. aluminium chloride is formed when aluminium oxide and---------- is strongly heated in dry chlorine gas
  3. 5. borazine B atoms are susceptible to ----------- attack
  4. 8. Boric anhydride is formed when ------- acid is heated
  5. 10. The [BH4]– ion cannot coordinate to a single metal ion in ------------ mode
  6. 13. BI3 is the strongest------- is acid