Answer :
For the element that you are doing a lewis dot diagram for you find how many valence electrons it has put the number of valence electrons around the symbol as the dots
3 6
4 1
7 2 <------ that's how you set the number
5 8 Of valence electrons
3 6
4 1
7 2 <------ that's how you set the number
5 8 Of valence electrons
