The Atom Practice Questions
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Question 1 of 5
1. Question
Directions: Read the question carefully, and choose the best answer.
1. How many protons does selenium (Se) have? (Refer to the periodic table.)
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Question 2 of 5
2. Question
2. Tin-112 (Sn-112) is the most abundant isotope of tin (Sn) and has a mass number of 112. If the atomic number of tin is 50, how many neutrons does Sn-112 have?
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Question 3 of 5
3. Question
3. Rank the following in order of increasing atomic radius: xenon (Xe), barium (Ba), cesium (Cs).
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Question 4 of 5
4. Question
4. What is the electron configuration of ground-state neutral magnesium (Mg)?
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Question 5 of 5
5. Question
5. Which of the following elements has a full valence shell?
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