The plum pudding model of the atom states that each atom has an overall negative charge. each atom has a dense, positively charged center. an atom is a solid, indivisible sphere that makes up all matter. an atom is made up of electrons in a sea of positive charges.

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.