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Holt Physical Science Chapter 11: Introduction to Atoms Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. How many neutrons does the most common isotope of hydrogen have?

Question 2 2. An element is defined by the number of:

Question 3 3. If only one type of atom makes up a substance, what can you call this substance?

Question 4 4. The Bohr model of the atom:

Question 5 5. The nucleus of an atom:

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Question 6 6. The average atomic mass or atomic weight found on the periodic table is _____.

Question 7 7. Which of the following has a positive charge and a mass of one amu?

Question 8 8. Who first coined the term atom, meaning indivisible?

Question 9 9. Particles that are found in the atomic nucleus are:

Question 10 10. Which element has a mass number of 12 and contains 6 neutrons?

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Question 11 11. Why should you avoid looking directly at magnesium burning?

Question 12 12. Which of the following was the instrument used for the discovery of the electron?

Question 13 13. When an electron moves from an excited state to a ground state, it will _____.

Question 14 14. ALL atoms of the same element have:

Question 15 15. How are isotopes of the same element similar?

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Question 16 16. What does the atomic number represent?

Question 17 17. Which of the following is an example of when an electron absorbs energy?

Question 18 18. The mass number indicates:

Question 19 19. Which scientist is credited with discovering the charge of individual electrons?

Question 20 20. Why did Democritus disagree with Aristotle?

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Question 21 21. When writing electron configurations, electrons are represented in their lowest possible energy state, called their _____.

Question 22 22. What did Rutherford discover in his gold foil experiment?

Question 23 23. X and Y are elements that are isotopes to each other. Which of the following is true about X and Y?

Question 24 24. If Atom #1 has 19 protons and 22 neutrons, and Atom #2 has 20 protons and 22 neutrons, are these isotopes of the same element?

Question 25 25. Magnesium has three common isotopes. Based on its average atomic mass, which is the most common?

Holt Physical Science Chapter 11: Introduction to Atoms Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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