UTF-8
255204255
METALS
non-METALS
Oxygen
1
org.concord.modeler.PageTextBox
1012.0
137.0
<html>
<head>
</head>
<body>
<img src="c10.jpg" width="1012" height="137">
</body>
</html>
-cc6601
1
20Goudy Stouttrue51 102 0
1
org.concord.modeler.PageTextBox
1320.0
55.0
<html>
<head>
</head>
<body>
<a href="sodium.cml"><font><img src="sodium.jpg" width="260" height="50">
</font></a><font><a href="magnesium.cml"><img src="magnesium.jpg" width="260" height="50">
</a><a href="aluminium.cml"><img src="aluminium.jpg" width="260" height="50">
</a><a href="potassium.cml"><img src="potassium.jpg" width="260" height="50">
</a><a href="calcium.cml"><img src="cal.jpg" width="260" height="50">
</a></font> </body>
</html>
-cc6601
1
20Goudy Stouttrue51 102 0
20Goudy Stouttrue
1
org.concord.modeler.PageTextBox
1315.0
55.0
<html>
<head>
</head>
<body>
<a href="nitrogen.cml"><font><img src="nitrogen.jpg" width="215" height="50">
</font></a><font><a href="oxygen.cml"><img src="oxygen.jpg" width="215" height="50">
</a></font><font><a href="fluorine.cml"><img src="fluorine.jpg" width="215" height="50">
</a></font><font><a href="phosphorus.cml"><img src="phosphorus.jpg" width="215" height="50">
</a></font><font><a href="sulphur.cml"><img src="sulphur.jpg" width="215" height="50">
</a><a href="chlorine.cml"><img src="chlorine.jpg" width="215" height="50">
</a></font> </body>
</html>
-1
1
30Times New Romantrue
1
org.concord.modeler.PageTextBox
1250.0
250.0
<html>
<head>
</head>
<body>
<h1>
Oxygen is a chemical element with symbol O and atomic number 8. It is a
member of the chalcogen group on the periodic table and is a highly
reactive nonmetallic element and oxidizing agent that readily forms
compounds (notably oxides) with most elements.[3] Photosynthesis
releases oxygen, and respiration consumes oxygen. Changes in
phosphate[clarification needed] are related to changes in oxygen
concentrations. Oxygen was discovered independently by Carl Wilhelm
Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in
Wiltshire, in 1774, but Priestley is often given priority because his
work was published first. The name oxygen was coined in 1777 by Antoine
Lavoisier,[5] whose experiments with oxygen helped to discredit the
then-popular phlogiston theory of combustion and corrosion.
</h1>
</body>
</html>
-1
1
1
org.concord.modeler.PageMd3doxygen$0.mddoxygen$0.xyz500500false
false
false
1
1
org.concord.modeler.PageMultipleChoice
false
4
400
200
<html>
<head>
</head>
<body marginwidth="5" marginheight="5">
Que: Who discovred Oxygen ? (multiple answers)
</body>
</html>
true
true
Carl Wilhelm Scheele
Joseph Priestley
Antoine Laviosier
All of the above
0 1
-34
org.concord.modeler.PageMultipleChoice
true
4
400
200
<html>
<head>
</head>
<body marginwidth="5" marginheight="5">
Que: Oxygen is essential for Human Being for ?
</body>
</html>
true
true
Respiration
Photosynthesis
Excretion
Combustion
0
-34
1
org.concord.modeler.PageTextBox
270.0
55.0
<html>
<head>
</head>
<body>
<a href="class10.cml"><font><img src="m.jpg" width="260" height="50">
</font></a> </body>
</html>
-1