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Physics MCI: Page 2
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<strong>Physics MCI:</strong> Page 2
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7. Ions that have a +2 charge
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<html>all have the same number of protons</html>
<html>have two more electrons than protons</html>
<html>have two more protons than neutrons</html>
<html>have two more protons than electrons</html>
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8. Which of the following atoms will most likely be stable and
non-radioactive?
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<html>an atom that has an equal number of neutrons and electrons</html>
<html>an atom that has an equal number of protons and electrons</html>
<html>an atom that has an equal number of protons and neutrons</html>
<html>an atom that has slightly more electrons than protons</html>
<html>an atom that has slightly more protons than electrons</html>
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<img height="225" src="atomSize.png" width="398">
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9. The illustration above shows the relative atom size of the first 18
elements. Given that high-energy orbitals tend to be larger than
low-energy orbitals, what can be observed about the illustration?
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<html>Each new row of the table starts with electrons in a new primary energy level.</html>
<html>Orbitals of atoms in the same row have electrons at the same primary energy levels.</html>
<html>Each new column of the table starts with electrons in a new primary energy level.</html>
<html>Orbitals of atoms in the same column have electrons at the same primary energy levels.</html>
<html>Both A and B</html>
<html>Both C and D</html>
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10. Which BEST describes the motion of individual atoms or molecules?
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<html>They appear to move randomly due to many collisions.</html>
<html>They have internal forces that cause them to move in random directions.</html>
<html>They only vibrate in place, unless they are stirred around.</html>
<html>They move in an orderly way, unless they are heated up.</html>
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11. In forensic analysis, one way to identify a substance is to observe
the vibrational frequencies of its molecules. Some molecules vibrate
differently than others. Why?
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<html>Some molecules have more energy than other molecules.</html>
<html>The mass of the atoms bonded together influences the force needed to vibrate them.</html>
<html>The bonds between atoms act like springs of varying strength, putting more or less force on the atoms.</html>
<html>Both B and C</html>
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12. What happens if you apply the same force to two atoms of different
mass and send them down a tube at the same time?
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<html>The atom of lesser mass reaches the end of the tube first.</html>
<html>The atom of greater mass reaches the end of the tube first.</html>
<html>Both atoms reach the end of the tube at the same time.</html>
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13. What is the reason for your answer above?
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<html>Applying the same force causes the atoms to accelerate (speed up) the same way.</html>
<html>The mass of the atoms affects how much force the atoms can have.</html>
<html>Acceleration depends on both the applied force and the mass of the object.</html>
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