The ball must be placed on the line of scrimage before snapped.
Assuming you are referring to a place kick or a punt, there is no rule dictating where the ball must be snapped to. Seven yards is standard as it should give the snapper, holder and kicker sufficient time to perform the kick.
no
Seven, of which two are eligible receivers. All other offensive players must be at least one yard behind the line of scrimmage (the exception being the quarterback) for one second before the ball is snapped.
In the National Football League, after a touchdown the ball is placed at the two yard line. In college football, after a touchdown the ball is placed at the three yard line. The kicker usually sets up seven yards behind the line of scrimmage. That would make a PAT around 19-20 yards in length.
Seven on offense. No requirements for the defense
Yes. There is no rule specifing how far behind the line of scrimmage the kick must take place. Seven yards is usually used as it is the shortest distance behind the line of scrimmage that the kick can take place without fear of it being blocked, if the blockers do their jobs.
The offense is allowed up to ten players on the line of scrimmage, need one to receive the ball from the center. But the offensive is required to have a minimum of seven players on the line of scrimmage. Defensively all eleven can play on the line of scrimmage.
On the offensive side, nobody has to be in a down position on the line of scrimmage, but there must be six men on the line. The defense does not have any regulations as to where they must line up on the line of scrimmage.
The passer only geta seven seconds to throw the ball or else he is considered down. Also, the blitzer has to be seven yards back from the line of scrimmage (LOS).
On the offense, at least seven, though technically you can have more if you wish. On defense there are no requirements.
It could be named siven, but the mathematicians voted for "seven", and placed it between 6 and 8.
In American Football the offensive side must have seven players on the line of scrimmage. At one time it could have more. If they did today, then the players between the ends would need to have interior linemen numbers.
The offense has to have at least seven men on the line of scrimmage. There are no such requirements for the defense. So although you'd never see it happen, there could theoretically be as few as seven people on the field.