Chapter 2. Chapter 2: Chemistry

Review & Rehearse
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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Review the visual summaries and answer the essay questions below.

Make sure to enter a brief response that completely answers each question and explains your reasoning. When you click "Submit," you will be provided instant feedback, allowing you to check if your response is correct.

(This activity contains 20 total essay questions. Each new question will be revealed once you complete the preceding question.)

1.

1. When we consider the mass of an atom, why do we ignore the weight of the electrons?

The mass of an electron is so small, less than one-twentieth of one percent of the weight of a proton, that its mass can be ignored when calculating the mass of an atom.

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