Across
- 4. What is the most abundant isotope of Oxygen?
- 5. which element will have a larger atomic radius, Sulfur or Neon?
- 7. What is the word for tendancy to gain electrons?
- 9. What subatomic particle has a positive charge?
- 10. orbitals What was Bohr's contribution to the atomic model?
- 11. Ionic compounds are good conductors when ___.
- 13. What kind of ion is always written first in an ionic compound?
- 14. As you go down the periodic table, the effect of the protons on the valence shell is weakened. Why?
- 17. Who organized a periodic table based on increasing atomic mass?
- 18. Is melting point a physical or chemical property?
- 21. lattice What kind of structure do solid ionic compounds form?
- 22. Covalent compounds have ___ melting points.
- 23. What kind of reaction is represented: Nickle oxide yields Nickle and oxygen?
Down
- 1. What is the name of N4O?
- 2. How would you describe the geometry of a polar molecule?
- 3. Which element will have a smaller electronegativity value, Calcium or Strontium?
- 6. What does the prefix deca mean?
- 8. Is density an intensive or extensive property?
- 12. Is a compound an example of a pure or impure substance?
- 15. replacement Which reaction is represented by the generic equation AB + CD ---> AD + CB?
- 16. What Kind of reaction is Mg + S ---> MgS?
- 19. In order to meet the octet rule, elements in covalent compounds ___ electrons.
- 20. A substance is positive for the Tyndall affect but can't be filtered, what kind of mixture is it?
- 21. What kind of change is food spoiling?