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Atoms & Molecules in Chemistry 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. What does the charge on a polyatomic ion mean?

Question 2 2. How many valence electrons are in a carbon dioxide (CO2) molecule?

Question 3 3. What is usually the first step when drawing a Lewis dot structure?

Question 4 4. How are ions formed?

Question 5 5. What charge do group IVA atoms have when they become ions?

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Question 6 6. A Magnesium atom is most likely to have what charge as an ion?

Question 7 7. What is an energy level in an atom?

Question 8 8. The energy corresponding to the first energy level in the hydrogen atom is:

Question 9 9. To excite an electron to a higher energy state, there needs to be:

Question 10 10. What is a covalent bond?

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Question 11 11. What are valence electrons?

Question 12 12. What is the octet rule?

Question 13 13. The nucleus of an atom:

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

Question 15 15. The mass number indicates:

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Question 16 16. In a line-angle drawing, what features are not usually drawn, but understood to be there anyway?

Question 17 17. Which of these is true?

Question 18 18. Molecules are considered 'organic' only if they contain

Question 19 19. What do you look at in the periodic table to determine the number of valence electrons possessed by an element?

Question 20 20. What is a valence electron?

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Question 21 21. How many dots would you put around carbon, a group IVA element?

Question 22 22. Which of the following is a true statement when writing the molecular formula for an ionic compound?

Question 23 23. What information can you retrieve from a molecular formula?

Question 24 24. Which of the following best describes this molecular formula 3H2O? (Note the 2 after the hydrogen atom is subscripted)

Question 25 25. How many bonds can hydrogen form?

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Question 26 26. Which of the following best describes the octet rule?

Question 27 27. When an electron transitions from a higher lever to a lower one,

Question 28 28. Where are the electrons in an atom?

Question 29 29. 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 30 30. DNA and proteins are examples of

Atoms & Molecules in Chemistry 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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