На конкретных примерах поясните, чем отличается строение атомов элементов побочных подгрупп от строения атомов элементов главных подгрупп

some people like to sit at their computers.they do not realize that in addition to computers, life is full of adventure.they do not realize that the computer is not the whole life, and that it is dangerous.Computers attract people and they become dependent on computers.these people are not interested in anything else in life, except computers, televisions, phones.parents are to blame, they bought, and the children that consume a lot.