CHEM 120 Final Exam Question Bank/ CHEM120 Final Exam Question Bank (Latest 2020) A RATED!! - $14.69   Add to cart

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CHEM 120 Final Exam Question Bank/ CHEM120 Final Exam Question Bank (Latest 2020) A RATED!!

 1. Question : (TCO 2) The atomic number of an atom is equal to the number of   Student Answer: electrons plus protons.   nuclei.   neutrons plus protons.   protons.   neutrons.   Instructor Explanation: Chapter 3; The atomic number = number of protons  2. Question : (TCO 2) Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is   Student Answer: 94.   30.   64.   32.   34.   Instructor Explanation: Chapter 3; Atomic number = number of protons. Therefore, in this case, the atomic number = 30.  3. Question : (TCO 2) No matter how much extra oxygen is available, 12 grams of carbon always combines with 32 grams of oxygen. This best illustrates the law of   Student Answer: conservation of mass.   multiple proportions.   definite proportions.   All of the above   None of the above   Instructor Explanation: Chapter 2  4. Question : (TCO 2) Which type of radioactivity has a negative charge?   Student Answer: Alpha   Beta   Gamma   All of the above   None of the above   Instructor Explanation: Chapter 3  5. Question : (TCO 2) The proton has   Student Answer: the same mass and charge as the electron.   a smaller mass and the same charge as the electron.   a smaller mass and opposite charge as the electron.   a larger mass and opposite charge as the electron.   None of the above   Instructor Explanation: Chapter 3  6. Question : (TCO 2) Isotopes are atoms of the same element with   Student Answer: a different number of neutrons.   a different number of electrons.   a different number of protons.   different atomic numbers.   None of the above   Instructor Explanation: Chapter 3  7. Question : (TCO 2) The atomic number of an element is   Student Answer: the number of protons in an atom.   equal to the positive charge of an atom’s nucleus.   equal to the number of electrons in a neutral atom.   All of the above are valid definitions.   None of the above   Instructor Explanation: Chapter 3  8. Question : (TCO 1) How many meters are in 7 yards? Show your work.   Student Answer:   x meters = 7 yd x (0.914 m/1 yd) = 6.4 m   Instructor Explanation: x meters = 7 yd x (0.914 m/1 yd) = 6.4 m (Chapter 1; 1 point for units, 1 point for conversion factor, 1 point for answer)

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