Great question! 1) Molecules and atoms are held together by electronic attraction - electromagnetism. It is usually considered under the heading of chemical bonding, which is explained by electromagnetic interaction. Electrons are held in their orbits about the nucleus of an atom by the same electromagnetic force.
The surname of Barnes is said to have three possible origins of the surname. The first possible origin of the surname of Barnes is of the Anglo-Saxon variety, and is a topographical surname, or possibly even an occupational surname.
This ancient medieval surname, recorded in the spellings of Noble, the much rarer patronymics of Nobles and Nobleson, and the unusual dialectals Knoble and Knobell is of Old French pre 8th century origin. The word noble was probably introduced into Britain by the Norman Invaders of 1066.