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DIRECTIONS: Choose the letter of the answer choice that best answers the question.

1. The way in which elements bond to form compounds depends on which of the following?

A. the model of the atom

B. the structural formula of the compound

C. the dissociation of the ions in the compound

D. the number and arrangement of electrons in the atoms of the elements

2. If an atom is made up of 6 protons, 7 neutrons, and 6 electrons, what is its atomic number?

INTERPRETING GRAPHICS: The graph below shows the energy in a chemical reaction as the reaction progresses. Use the graph to answer the questions that follow.

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