Write each element's orbital notation and complete electron configuration  -beryllium  - aluminum -nitrogen -sodium

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1) Beryllium: The atomic number of beryllium is 4 and its electronics configuration is `1s^2, 2s^2` . Looking at the electronic configuration, we can see that beryllium is a noble gas, since it has completely filled electronic orbital. 

2) Aluminum: The atomic number of aluminum is 13. The electronic configuration is `1s^2, 2s^2, 2p^6, 3s^2, 3p^1.`

3) Nitrogen: The atomic number of nitrogen is 7 and its electronic configuration is `1s^2, 2s^2, 2p^3.` Nitrogen is a non-metal and can gain up to 3 electrons to achieve completely filled electronic orbital. 

4) Sodium: The atomic number of sodium is 11 and its electronic configuration is `1s^2, 2s^2, 2p^6, 3s^1` . Sodium is a metal and can lose 1 electron readily to become a cation and participate in ionic bonds.

The orbital notation of sodium and nitrogen is attached for your reference, as example.

Hope this helps.


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