Introduction
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
Here you will be able to acquire knowledge of the atomic constituents and isotopes.
Task
In order to master the topic of atomic structure, and isotopes watch this video till 5:20 in ENGLISH:
and this link http://www.livescience.com/37206-atom-definition.html
After watching this video and reading the link answer the following 10 questions, which will strengthen your knowledge:
1. What an atom consists of?
2. What nucleus consists of?
3. What are called protons and neutrons, that have already formed a nucleus?
4. What electron shell consists of?
5. What is the electron charge?
6. What has equal amount in the nucleus?
7. Which of these letters stand for proton number?
a) A
b) N
c) Z
8. How are called atoms of chemical elements, which atomic nucleus vary by different amount of neutrons N?
9. Determine the number of neutrons in carbon! (Use the periodic table!)
10. Determine the number of protons in these isotopes Mg-24 ; Mg-25; Mg-26 isotopes! (Use the periodic table!)
The answers are given in the teachers page.
Process
To be able to answer 10 questions, you have to learn the theme of the atomic constituents and isotopes. If the video material did not provide a complete understanding of the topic, you can use these links ( http://education.jlab.org/qa/atom.html and http://chemistry.about.com/od/chemistryglossary/a/isotopedef.htm )
Evaluation
10 questions are corresponding to 10 points so it means that for each wrong answer one less point!
Conclusion
This work will gain your knowledge of the atomic constituents and isotopes.
Credits
Darbs veidots par atomu un atoma kodolu, un izotopiem.
Izpildot darba uzdevumu skolēns nostiprina savas zināšanas.
Teacher Page
Here are the answers to all of the questions:
1. Every atom is composed of a nucleus and one or more electrons bound to the nucleus.
2. Nucleus consists of protons that have a positive electric charge and neutrons that have no electric charge.
3. Protons and neutrons are called nucleons.
4. Electron shell is composed of electrons.
5. The electrons have a negative electric charge.
6. Protons and neutrons have a similar amount.
7. Z
8. These kind of chemical elemnt atoms are called isotopes.
9. 12-6=6
10. 12