Name: ___________________________________________ Period: ____ Date: ________

Dekalb Reads Assignment 3.2 B

A Guided Tour of the Periodic Table

Read pages 81-84 and answer the questions

 

  1. Why are the atoms of group I elements reactive?
  2. Define Ionization.
  3. What is an ion?
  4. Define anion.
  5. Define cation.
  6. How many electrons does a Lithium atom lose?
  7. In which group ‘Li’ is located?
  8. Who many electrons are there in first and 2nd energy levels of ‘Li’?
  9. What makes ‘Li’ very reactive? Why?
  10. Li+ is much less reactive than ‘Li’. Why?
  11. How many electrons does a Fluorine atom gain?
  12. Why is Fluorine very reactive?
  13. How many electrons does a Fluorine atom need to have a full outer most energy level?
  14. What do ions of ‘F’ called?
  15. How many valence electrons do each elements of ‘F’ group has?
  16. Why do deferent elements have different properties?
  17. Define atomic number.
  18. Why are the atoms neutral?
  19. Name the largest naturally occurring atom?
  20. Can the atomic # of a given element change?
  21. What does ‘Z’ represent?
  22. What does ‘A’ represent?
  23. Define Isotope.
  24. Name the 3 isotopes of hydrogen gas. How do they differ from each other?
  25. Name the gas present in sun.
  26. Which isotope of Hydrogen is most common?
  27. Which isotope of hydrogen is unstable?
  28. How much of the earth’s crust is Hydrogen?
  29. 75% of the mass of sun is due to a gas. Name that gas.
  30. What is the ratio of protium and deuterium isotopes?
  31. How will you calculate # of neutrons in the nucleus of an atom?
  32. What is amu?
  33. Define "average atomic mass".

 
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