CHEMISTRY

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media type="custom" key="4893535" media type="custom" key="4893573" I like this video because is animated and shows you need to get out pollution in lakes or whatever to save the planet.

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Reviewed by GL:

Chemistry Homework:

1. What is the name of your element?

The name of my element is Cerium.

2. What is the symbol for your element?

The symbol of my element is Ce.

3. What is the atomic number? The atomic number is 58.

4. What is the atomic mass?

The atomic mass is 140.166.

5. What is your element used for?

It uses for self-cleaning ovens. Also Cerium sulfate is used in photography. Cerium and it derivates have many applications: ceramics and textile idustries.

6. Develop 2 more questions about your element and write the questions and answers. a)When was the Cerium discovered and who was the discoverer of it?

Cerium was discovered by Jons Jacob Berzeluis and Wilhelm von Hisinger in 1803.

b) What are the characteristics of Cerium?

- Cerium is an iron-grey lustrous metal. - It is malleable, and oxidieses very readly at room temperature, especially in moist air. - It is the most abundant of the rare earth metals and is found in minerals allanite, monozite, cerite and lastnaesite.

Reflection Questions

1. How might understanding how to use the Periodic Table be useful?

It is useful because it helps me to research and recognizing the elements, and to understand what they are, what there used for and why people like it.

2. Compare and contrast your knowledge before and after your research on your element.

It is very important for me to know about the element I research. Before research it I didn't know how important is Cerium in our lifes. Now know that Cerium has a lot of characteristics and important uses for many industries.

Resources

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Reviewed by GL

The atomic element configuration is the distribution of electrons inside the electronic cloud. The moller ruler swows the levels and sublevels of energy. The elrctronic configuration of an atom in the shell atomic model may be expressed by indicating the number of electrons in each shell beginning with the first.

The Chemical Elements are relative to the chemical substance. It have numbers of protons in the nucleus. Example: 6 protons = Atomic Number of Carbon.

Chemical elements use groups and columns and periods. You can find the chemical elements in the periodic table. In the periodic table, the elements are arranged in order of atomic number. The elements with similar properties are in the same column are part of a group. Elements in the same group have the same number of electrons in the outer energy levels of their atoms.

The arrangment of electrons give elementstheir chemical properties. a) All the elements on the left side of the periodic table, except hydrogen, are metals. b) All elements on the far right are nonmetals. c) Some metals have properties of both metals and nonmetals. These elements are called metaloids.

RESOURCES: Harcourt - science Britannica Online encyclopedia.