Tuesday, March 16, 2010
Review of Animations
It was interesting to see the various structures of the quicktime animations, but then I checked into some of the categories under "semester 2", such as Nutrition and Energy for life and really liked the way they presented the information. The super simple point form and diagrams broke down all the content very effectively. I would definitely use this for future reference.
Semiconductor of the week- POLONIUM
Polonium (Po) Atomic number 84
-Polonium is a radioactive, extremely rare semi-metal.
-It is reactive, silvery-gray, it dissolves in dilute acids, but it is only slightly soluble in alkalis.
-Polonium was once used in textile mills (to eliminate static charges) and by the manufacturers of photographic plates (in brushes to remove the accumulated dust).
-It is used as a source of alfa-radiation for research and, alloyed with beryllium it can act as a portable source of neutrons, which normally only access to a nuclear reactor can provide.
-Polonium has been found in tobacco smoke from tobacco leaves grown with phosphate fertilizers
-Polonium is the only component of cigarette smoke that has produced cancer by itself in laboratory animals by inhalation - tumors appeared already at a polonium level five times lower than those of a normal heavy smoker.
-Because of its very high toxicity, polonium can be used as a poison such was the case with the poisoning of Alexander Litvineko (former KGB officer)
-Polonium is a radioactive, extremely rare semi-metal.
-It is reactive, silvery-gray, it dissolves in dilute acids, but it is only slightly soluble in alkalis.
-Polonium was once used in textile mills (to eliminate static charges) and by the manufacturers of photographic plates (in brushes to remove the accumulated dust).
-It is used as a source of alfa-radiation for research and, alloyed with beryllium it can act as a portable source of neutrons, which normally only access to a nuclear reactor can provide.
-Polonium has been found in tobacco smoke from tobacco leaves grown with phosphate fertilizers
-Polonium is the only component of cigarette smoke that has produced cancer by itself in laboratory animals by inhalation - tumors appeared already at a polonium level five times lower than those of a normal heavy smoker.
-Because of its very high toxicity, polonium can be used as a poison such was the case with the poisoning of Alexander Litvineko (former KGB officer)
Balancing Equations tutorial
For some reason, the way this was set up was a bit confusing for me. The way it was explained in class made sense to me and I think I have the hang of balancing these equations but I felt that the online tutorial made it seem a bit more complicated.
Review of Chembalancer
Actually this was pretty fun- my best score was 7 in a row for the Element quiz- not so great, but I got 10/11 in the chembalancer and I really liked the layout because it gives you a chance to see how many atoms you have before committing to the answer.
Update on Chikyu
Since someone has already posted Chikyu's official website with the most up to date info, I thought I would include this link to a video explaining how they are doing the deep sea drilling which is quite helpful for the visual learners.
http://news.bbc.co.uk/2/hi/science/nature/8064293.stm
http://news.bbc.co.uk/2/hi/science/nature/8064293.stm
What is a Mole?
A mole is unit for measuring large quantities of very small entities like atoms and molecules. A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is about 6.02x1023.
I could tell that the Mole link did quite a good job at laying out the information, as I did have a few glimmers of comprehension while reading it but I am still not completely confident in my understanding. This is more a matter of my right brain tendencies rather than the link I think.
I could tell that the Mole link did quite a good job at laying out the information, as I did have a few glimmers of comprehension while reading it but I am still not completely confident in my understanding. This is more a matter of my right brain tendencies rather than the link I think.
Week 7 Alkali Earth Metal MAGNESIUM
Magnesium (Mg) atomic number 12
-Magnesium is a silvery-white, light weight metal and is fairly strong.
-Magnesium is the eighth most abundant element in the earth's crust although not found in it's elemental form.
-There are massive amounts of magnesium in seawater.
-Magnesium is used in electronic devices such as mobile phones, laptops and cameras, for its low weight, good mechanical and electrical properties.
-It is also popularly used for car engine components
-Magnesium is an important element for plant and animal life. It is the metallic ion at the center of Chlorophyll and is commonly used as an additive to fertilizers.
-Magnesium is a highly flammable metal, easy to ignite when powdered or shaved into thin strips, but difficult to ignite in mass or bulk.
-Magnesium metal burns with a very bright light.
-The adult human daily requirement of magnesium is about 0.3 g/ day. Magnesium is a vital component of a healthy human diet. Low levels of magnesium in the body has been associated with the development of a number of human illnesses such as asthma, diabetes, and osteoporosis.
-In 1618, a farmer at Epsom in England attempted to give his cows water from a well. They refused to drink because of the water's bitter taste. However the farmer noticed that the water seemed to heal scratches and rashes. The fame of Epsom salts spread. Eventually they were recognized to be hydrated magnesium sulfate, MgSO4.
-Magnesium is a silvery-white, light weight metal and is fairly strong.
-Magnesium is the eighth most abundant element in the earth's crust although not found in it's elemental form.
-There are massive amounts of magnesium in seawater.
-Magnesium is used in electronic devices such as mobile phones, laptops and cameras, for its low weight, good mechanical and electrical properties.
-It is also popularly used for car engine components
-Magnesium is an important element for plant and animal life. It is the metallic ion at the center of Chlorophyll and is commonly used as an additive to fertilizers.
-Magnesium is a highly flammable metal, easy to ignite when powdered or shaved into thin strips, but difficult to ignite in mass or bulk.
-Magnesium metal burns with a very bright light.
-The adult human daily requirement of magnesium is about 0.3 g/ day. Magnesium is a vital component of a healthy human diet. Low levels of magnesium in the body has been associated with the development of a number of human illnesses such as asthma, diabetes, and osteoporosis.
-In 1618, a farmer at Epsom in England attempted to give his cows water from a well. They refused to drink because of the water's bitter taste. However the farmer noticed that the water seemed to heal scratches and rashes. The fame of Epsom salts spread. Eventually they were recognized to be hydrated magnesium sulfate, MgSO4.
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