Well in chemical bonds between two atoms there are single (2 electrons shared), double (4 electrons shared) triple 6 electrons shared and quadruple bonds (8 electrons) shared. Where electrons are...
Based on the 2003 International Building Code: minimum of 70 square feet for 1 person per room; + 50 square feet for each additional person in the room.
1 person @ 70 sq ft
2 person @ 120 sq ft
3...