Across
- 1. What phase is nitrogen (N, 7) at standard temperature and pressure?
- 6. You should be able to “read” electron configurations and ___ diagrams for the exam.
- 7. Which kind of electromagnetic radiation carries the highest amount of energy (has the shortest wavelength)?
- 10. Special name for Group 17 elements.
- 13. Thomson destroyed the concept of an indivisible atom when he discovered the ___ (later to be called the “electron”).
- 14. The 3-D shape of an “s” orbital.
- 15. As photon wavelength decreases the photon’s energy increases.
- 20. We use the water ___ method to measure the volume of irregularly shaped objects and you be able to do this for the exam.
- 22. An electron gains energy and moves to a higher energy orbit when it ___ energy.
- 24. Mass is divided by volume to calculate ___ for an object or material and you should be able to do this for the exam.
- 25. In the equation used to calculate the energy in light photons, what does “c” represent?
- 30. The Greek letter lambda (upside-down walking “y”) represents ___.
- 31. An isotope ___ contains the element symbol, mass number and atomic number.
- 32. Which scientist developed the Plum Pudding Model from his study of cathode ray tubes?
- 33. You should be able to draw Bohr models and write ___ dot structures for the exam.
Down
- 2. ‘aq’ in "NaCl(aq)" means ___ and tells us the substance is dissolved in water.
- 3. Special name for Group 1 elements.
- 4. The ___ Mechanical Model describes the motion of small particles confined to tiny regions of space.
- 5. One of the elements that occurs as a liquid at standard temperature and pressure.
- 8. You should be able to calculate the ___ atomic mass given the isotopic data for an element.
- 9. The solid that forms when two clear solutions are mixed together.
- 11. Which scientist gave us the idea of orbits and described how light is generated by the atom?
- 12. Within which category do most elements fit?
- 16. What does the Greek letter delta mean in Chemistry?
- 17. Which scientist gave us the idea of a nucleus and an atom that was filled with mostly empty space?
- 18. For two or more atoms to be ____ of a certain element they must have the same atomic number and they must have different mass numbers.
- 19. What major element category does boron (B, 5) fall within?
- 21. As photon wavelength increases the photon’s ___ decreases.
- 23. Which kind of electromagnetic radiation has the longest wavelength (carries the lowest amount of energy)?
- 26. Number of valence electrons in all atoms of Group 15 elements.
- 27. What is the first element in the group represented by VIA?
- 28. Which scientist thought the atom was a small indivisible and solid piece of matter?
- 29. The percent ___ is used to express the difference between a measurement and its accepted value and you should be able to do this for the exam.