why is helium called a noble gasses element
what is octet configuration
how many electrons does an atom of nitrogen need to have a nobel gas configuration atomic no of n is 7 with full formula
an ion has 6 electrons and 7 protons is it cation or proton explain
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Explanation:
Helium is called a noble gas because it's outer most shell is fully filled with electrons
N require 3 more electrons to attain Noble gas configuration
It is called cation or proton because the sign of the net charge is positive
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