Describe one major change that occured in the modern atomic model

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o