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Question 1 (1 point) How can oxidation numbers help you determine a redox reaction? When are oxidation numbers used instead of a valence number?

Question 2 (1 point) ✓ Saved If an atom gains electrons, why is it called a reduction?

Question 3 (1 point) Why is a voltaic cell created in two separate beakers?

Question 7 (4 points) Balance the following half-reaction in an acidic solution: HNO2(aq) → NO3(aq)

3 6 Question 8 (4 points) Balance the following reaction in a basic solution: Ag(s) →>> Ag₂ O (aq)

Question 9 (1 point) Explain how Rutherford's experiment disproved Thompson's model of the atom.

Question 10 (1 point) Explain how light is emitted when an electron is excited.

Question 11 (1 point) Explain how a sub-orbital is different than an orbital.

Question 12 (3 points) Draw (use the equation editor) an energy level diagram for sodium.

Question 13 (1 point) Write the short form electron configuration for lithium.

Question 14 (1 point) Write the long form electron configuration for fluorine.