Name_________________________                                                         Date______________________

Period________________

The Periodic Table of the Elements

Getting Started:

1. Obtain a laptop (sit at a computer).
2. Log-in to the network and open Internet Explorer
3. In the address bar type: http://periodic.lanl.gov/default.htm
4. If you have any problems ask for assistance.

Directions:  Using the periodic table and the links above the periodic table you will learn about the organization and history of the periodic table.  Use these links to answer the following questions.


1.   What is an atom's atomic number?   What is its atomic mass?




2.   How do you determine the number of neutrons in an atom?




3.  What is a period?  What is true about all elements in a period?




4.  What is a group?  What is true about all elements in a group?




5.  How is the modern periodic table organized?




6.  What two things did Mendeleev use to organize his periodic table?




7.  What is the obvious difference between the organization of Mendeleev's periodic table and the modern periodic table we use today?




8.  Using the periodic table, indicate the number of protons, the atomic number, and the number of neutrons in the following elements.

             Carbon                              Xenon                                 Boron                                 Nitrogen                                 Aluminum

             Hydrogen                            Potassium                           Tin                                      Iron                                       Gold


Bonus:  In a neutral atom, what is true about the number of protons and electrons?

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