Chapter 2 Quiz 1

Chapter 2 Quiz 1

Chapter 2 Quiz 1
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1		Which isotope has 6 neutrons?
			A)	¹³₆C
			B)	⁶₃Li
			C)	¹⁵₈O
			D)	¹³₇N


2		Which is true concerning CFCs or Freons?
			A)	Freon 11 and 12 react photochemically with ultraviolet light to produce chlorine atoms in the atmosphere.
			B)	Freons were used because they are non-toxic, non-flammable, and virtually inert.
			C)	The use of recycled Feon-11 and 12 is allowed in the U.S., but tightly regulated.
			D)	All of the above statements are true.


3		Ozone is important because it absorbs some wavelengths of light that enter the atmosphere. Which is true concerning ozone and the biological effects of UV light?
			A)	Ozone has the same structure as carbon dioxide, with two double bonds (O=O=O).
			B)	Ozone absorbs light below 300 nm, the spectral region in which biological damage is maximum.
			C)	Ozone is harmful biologically and is considered a pollutant in the upper atmosphere.
			D)	A and B are true.


4		Which is true concerning ozone concentrations in the atmosphere?
			A)	The ozone concentration has decreased substantially (i.e. 20%) since the early 1940's.
			B)	The ozone concentration is rather constant over the course of a year, changing by only 1 or 2 ppm.
			C)	The ozone concentration is largely in equilibrium with carbon monoxide, due to the carbon cycle.
			D)	All of these statements are true.


5		A diatomic molecule has the structure shown. Based on the use of outer shell electrons, what is a reasonable identity for "X" in the structure?
			A)	X = Ne
			B)	X = F
			C)	X = O
			D)	X = N


6		For these three parts of the electromagnetic spectrum, which is the correct order of increasing wavelength?
			A)	visible, ultraviolet, infrared
			B)	infrared, visible, ultraviolet
			C)	ultraviolet, visible, infrared
			D)	ultraviolet, infrared, visible


7		Which region of the atmosphere contains ozone that helps to protect us from ultraviolet rays, the "good" ozone?
			A)	ionosphere
			B)	mesosphere
			C)	stratosphere
			D)	troposphere


8		How many protons, neutrons, and electrons are in a neutral atom of ⁶⁴₂₉Cu?
			A)	protons = 64, neutrons = 29, electrons = 29
			B)	protons = 35, neutrons = 29, electrons = 35
			C)	protons = 29, neutrons = 35, electrons = 29
			D)	protons = 29, neutrons = 64, electrons = 35


9		What is the correct number of outer electrons and the Lewis (electron-dot) structure for carbon monoxide, CO?
			A)	10 e^- and
			B)	14 e^- and
			C)	10 e^- and
			D)	14 e^- and


10		Which statement comparing these two waves in the electomagnetic spectrum is correct?
			A)	Wave 1 has a lower frequency and travels at the same forward speed as Wave 2.
			B)	Wave 1 has a higher frequency and travels at the same forward speed as Wave 2.
			C)	Wave 1 has a lower frequency and travels at a faster forward speed than Wave 2.
			D)	Wave 1 has a higher frequency and travels at a slower forward speed than Wave 2.


11		Which of these forms of solar radiation has the lowest potential for damage to biological systems?
			A)	infrared radiation
			B)	microwaves
			C)	visible radiation
			D)	X-rays


12		What was the Montreal Protocol's main strategy for reversing stratospheric ozone depletion?
			A)	eliminating illegal CFCs from being imported or exported
			B)	requiring developing and developed countries to follow the same restrictions on CFCs
			C)	improving computer modeling of the upper atmosphere to monitor CFCs
			D)	limiting the production and use of CFCS


13		Which subatomic particles are found in the nucleus of an atom?
			A)	protons and neutrons
			B)	protons and electrons
			C)	neutrons and electrons
			D)	protons, neutrons, and electrons


14		Which is the correct Lewis symbol for an atom of carbon?
			A)
			B)
			C)
			D)


15		For any region of the electromagnetic spectrum, the energy of a photon is
			A)	directly proportional to the frequency.
			B)	directly proportional to the wavelength.
			C)	directly proportional to the speed of light.
			D)	directly proportional to Planck's constant, h.


16		What is represented by these sphere equations showing the three steps of the Chapman cycle? Each sphere represents an oxygen atom.
			A)	They represent the destruction of stratospheric ozone caused by the chemical attack from CFC free radicals. This is a disturbance of the normal process.
			B)	They represent the release of Cl free radicals after they have reacted with oxygen, disturbing the steady state of ozone formation in the stratosphere.
			C)	They represent the dynamic equilibrium between the formation of stratospheric ozone and its destruction. This is the normal steady-state process.
			D)	They represent the normal process that produces excess ozone in the stratosphere when no CFCs or other ozone-depleting substances are present.

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