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Electron Configuration and Noble Gas Notation Practice
We’ve seen that electron configurations may be shown using an energy level diagram (orbital filling diagrams),
electron configuration notation or noble gas configuration, or electron dot notation. This worksheet will allow
you to practice these various methods for atoms and ions.
PART I:
ELEMENT: Ca
1. Write the full electron configuration. ___1s22s22p63s23p64s2__
2. How many valance electrons does Ca have? 2
3. Write the electron dot notation to show the valence electrons.
4. Write the noble gas configuration. ___[Ar]4s2___________________________________
5. When calcium loses 2 electrons, it will have the same configuration as the noble gas Argon. This means
that Ca will have a full octet and will be more stable as an ion.
ELEMENT: Mn
1. Write the full electron configuration. ___1s22s22p63s23p64s23d5_
2. How many valence electrons does Mn have? 2
3. Write the electron dot notation to show the valence electrons.
4. Write the noble gas configuration.__ ___[Ar]4s23d5_____
PART II:
Write the full electron configuration for the following elements
Example: Silicon 1s22s22p63s23p2
1. Chlorine
2. Selenium
1s22s22p63s23p5
1s22s22p63s23p64s23d104p4
PART III: write the noble gas configuration for the following:
Example : Silicon [Ne] 3s23p2
1. Cobalt
[Ar]4s23d7
2. Rubidium [Kr]5s1
3. Xenon [Kr]5s24d105p6
4. Uranium
[Rn]7s26f4
PART IV: List the region of the periodic table where each of the following elements is found. Determine the
region using s block, p block, d block, or f block.
Example: Silicon d-block, transition metal
1. Oxygen p block, non-metal
2. Sodium s block, metal
3. Cobalt d block, transition metal
4. Rubidium d block, transition metal
5. Xenon p block, non-metal
PART V: Identify the following elements based on the clues given.
1. _Cadmium__ it’s noble gas configuration is [Kr]5s24d10
2. __Calcium_When this element from a +2 ion, it (gains/loses) 2 electrons and has the same electron
configuration as Ar.
3. _Fluorine__When this element forms a -1 ion, it (gains/loses) 1 electron and has the same configuration
as Ne.
4. _Francium_When this element forms a +1 ion, it (gains/loses) 1 electron and has the same electron
configuration as Rn.
5. _Tungsten_This element’s noble gas configuration is [Xe]6s24f105d4