21. During a lab in her Biology class at Jamul High School, Romilda set up an experiment testing the effects of running on production of carbon dioxide. She decided to only use female students between the ages of 14 – 17. All of the female students also needed to weigh between 85 – 105 pounds and measure between 22% - 32% body fat. Half of the female students will not run, while the other half will run for 25 minutes every day for 30 days.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.