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Each of the following describes an “Atom 1” and an “Atom 2.” In which case are the two atoms different isotopes of the same element?

All the following statements about Mars are true. Which one might be the cause of a significant loss of atmospheric gas to space?

Which of the following best describes the fundamental difference between two different chemical elements (such as oxygen and carbon)?

Which of the following statements about electrons is not true?

You have a sample rock bearing the unstable isotope potassium-40 (40K) which decays into the stable isotope argon-40 (40Ar) over the course of a 1.3-billion year half life. In your sample you analyze the two isotopes and find that you have 8 g of 40K. The 40Ar analysis indicates that the sample originally started with 32 g of 40K. What is the age of this sample in years?

Energy Level Transitions. The diagram below shows five transitions (labeled with capital letters A through E) representing an electron moving between energy levels in a hydrogen atom. electron jumps.jpg  Which transition could represent an atom that absorbs a photon with 10.2 eV of energy?   

Match each world with the best description of its atmosphere.  Some answers will be used more than once.

Which of the following is not a way light and matter interact?

You may use and calculator and scratch paper.  The exam must be completed in one sitting.

Assume that the graphs show a competitive market for the product stated in the question.     Select the graph above that best shows the change in the market for chicken when the price of a substitute, such as beef, decreases.