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I. Oxygen and Ozone<br />
Objectives:<br />know the names and formulas of oxygen and ozone.<br />define allotrope.<br />know the structure, properti...
I. Oxygen and Ozone<br />There are two types of oxygen molecules that exist in the earth’s atmosphere:<br />	1. molecules ...
I. Oxygen and Ozone<br />O2 and O3 are allotropes of the element oxygen.<br />allotrope – 	one of two ore more forms of an...
I. Oxygen and Ozone<br />Structure of oxygen – O2:<br />Most oxygen exists in the form of diatomic molecules (two oxygen a...
I. Oxygen and Ozone<br />2. 	Properties  of oxygen – O2:<br />Colorless, odorless, and tasteless gas.<br />Oxygen reacts w...
I. Oxygen and Ozone<br />Occurrence of oxygen – O2:<br />Oxygen makes up approximately 21 % by volume of the air we breath...
I. Oxygen and Ozone<br />Structure of ozone – O3:<br />Ozone molecules consist of 3 oxygen atoms covalently bonded togethe...
I. Oxygen and Ozone<br />Properties of ozone – O3:<br />O3 at ground level (bad) - poisonous blue gas with a pungent odor;...
I. Oxygen and Ozone<br />Occurrence of ozone – O3:<br />O3 in the upper atmosphere (good) – ozone molecules absorb harmful...
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Notes i. oxygen and ozone - 2010

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Transcript of "Notes i. oxygen and ozone - 2010"

  1. 1. I. Oxygen and Ozone<br />
  2. 2. Objectives:<br />know the names and formulas of oxygen and ozone.<br />define allotrope.<br />know the structure, properties, and occurrence of oxygen and ozone.<br />
  3. 3. I. Oxygen and Ozone<br />There are two types of oxygen molecules that exist in the earth’s atmosphere:<br /> 1. molecules of 2 oxygen atoms – O2 called oxygen<br /> 2. molecules of 3 oxygen atoms – O3 called ozone<br />
  4. 4. I. Oxygen and Ozone<br />O2 and O3 are allotropes of the element oxygen.<br />allotrope – one of two ore more forms of an element that have <br /> the same physical state<br />
  5. 5. I. Oxygen and Ozone<br />Structure of oxygen – O2:<br />Most oxygen exists in the form of diatomic molecules (two oxygen atoms double covalently bonded together).<br />Diatomic oxygen molecules have a linear shape.<br />
  6. 6. I. Oxygen and Ozone<br />2. Properties of oxygen – O2:<br />Colorless, odorless, and tasteless gas.<br />Oxygen reacts with many metals to form oxides. <br />oxide - ionic compound containing the O-2 ion<br />
  7. 7. I. Oxygen and Ozone<br />Occurrence of oxygen – O2:<br />Oxygen makes up approximately 21 % by volume of the air we breathe.<br />Oxygen is the most abundant element by mass in the earth’s crust, waters, and atmosphere. (*Hydrogen is the most abundant element by number of atoms.)<br />
  8. 8. I. Oxygen and Ozone<br />Structure of ozone – O3:<br />Ozone molecules consist of 3 oxygen atoms covalently bonded together.<br />Ozone molecules have a bent shape.<br />
  9. 9. I. Oxygen and Ozone<br />Properties of ozone – O3:<br />O3 at ground level (bad) - poisonous blue gas with a pungent odor; constituent of smog; harmful to plant tissue and lungs<br />
  10. 10. I. Oxygen and Ozone<br />Occurrence of ozone – O3:<br />O3 in the upper atmosphere (good) – ozone molecules absorb harmful uv radiation from the sun; ozone acts as the Earth’s natural sunscreen<br />Over 90% of ozone naturally occurs in the upper atmosphere.<br />The ozone in the upper atmosphere is referred to as the ozone layer.<br />
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