Final answer:
A 12-lead EKG consists of six electrodes on the chest and four electrodes on the limbs to represent different views of the heart's electrical activity.
Step-by-step explanation:
In a 12-lead EKG, there are six electrodes placed on the chest and four electrodes placed on the limbs. The electrodes on the chest are placed in specific locations to represent different leads or views of the heart's electrical activity. The limbs electrodes are placed on the right arm, left arm, right leg, and left leg.