On monday only talk about immigration and i make one redaction about this, because if we make this will have a 0.5 points in the final evaluation. The immigration is a phenomen that make that the people travel to other countries for looking a new job, another live and better situations.
On tuesday we finished the one theme. We talked about properties of metals and non-metals and listened one listening and maked a lot of exercices.
When i started to realize the redaction about immigration, discovered interesting things like for example that 10% of the Spanish population are immigrants. Or the millions of people who emigrate every year.
A very quiet been a week, and also I had to study mac, I have an exam next Tuesday. Greetings ¡¡
domingo, 18 de octubre de 2009
lunes, 5 de octubre de 2009
Practice 3. Talking about Chromium and sodium
Now in laboratory class, I have choose two elements on the periodic table and explain this properties, principal fields of aplications, chemical properties, phisical properties...
My two elements are: Chromium and sodium.
The first element, has a melting point of 1857+/-20°C, boiling point of 2672°C, specific gravity of 7.18 to 7.20 (20°C), with valences usually 2, 3, or 6 (When appears with valence 3, the chromium is benign for humans and lifes, because when appears with valence 6, is toxic and produces cancer and others diseases). The metal is a lustous steel-gray color which takes a high polish. It is hard and resistant to corrosion. In addition chromium has a high melting point, stable crystalline structure, and moderate thermal expansion. All chromium compounds are colored.
The sodium is used to produce soda and also in many industrial processes. The sodium obtained by electrolysis (also sodium is relatively abundant in the sun and other stars). Sodium chloride is important for animal nutrition. Sodium compounds are used in the glass, soap, paper, textile, chemical, petroleum, and metal industries.
Has a melting point of 97.81 +/- 0.03°C, boiling point of 882.9°C, specific gravity of 0.971 (20°C), and a valence of 1 ( always ). It is soft and highly reactive.
My two elements are: Chromium and sodium.
The first element, has a melting point of 1857+/-20°C, boiling point of 2672°C, specific gravity of 7.18 to 7.20 (20°C), with valences usually 2, 3, or 6 (When appears with valence 3, the chromium is benign for humans and lifes, because when appears with valence 6, is toxic and produces cancer and others diseases). The metal is a lustous steel-gray color which takes a high polish. It is hard and resistant to corrosion. In addition chromium has a high melting point, stable crystalline structure, and moderate thermal expansion. All chromium compounds are colored.
The sodium is used to produce soda and also in many industrial processes. The sodium obtained by electrolysis (also sodium is relatively abundant in the sun and other stars). Sodium chloride is important for animal nutrition. Sodium compounds are used in the glass, soap, paper, textile, chemical, petroleum, and metal industries.
Has a melting point of 97.81 +/- 0.03°C, boiling point of 882.9°C, specific gravity of 0.971 (20°C), and a valence of 1 ( always ). It is soft and highly reactive.
domingo, 4 de octubre de 2009
End of september
As the Green Day song "Wake Me Up When September Ends." I hope to wake up because the course has already started and you have to get to work.
On Monday we did the practice number two, which consisted in learning to use relatives. You will learn more about effective presentations, watching another video in which an older man spoke.
On Tuesday we studied types of materials, and classified according to their properties . We did several exercises to learn new vocabulary.
Finally say, Anna's teacher, we explained that we could be with other erasmus students for discussions and meeting, also for them to feel integrated in our university and our environment.
On Monday we did the practice number two, which consisted in learning to use relatives. You will learn more about effective presentations, watching another video in which an older man spoke.
On Tuesday we studied types of materials, and classified according to their properties . We did several exercises to learn new vocabulary.
Finally say, Anna's teacher, we explained that we could be with other erasmus students for discussions and meeting, also for them to feel integrated in our university and our environment.
Suscribirse a:
Entradas (Atom)
