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discussions1-3.docx

 Discussion Question 1

 Theories, hypotheses, and laws form the life-blood of chemistry. Using the South University Online Library or the Internet, conduct research on scientific theories, hypotheses, and laws. Based on your research, answer the following:

·  What do you think is the difference between a scientific theory, scientific hypothesis, and scientific law?

· Is there a sequential move from one to another; amongst scientific law, theory, and a hypothesis?

· Describe controlled conditions to find a scientific solution to a problem.

 

Discussion Question 2

 Every measurement has a measurement uncertainty. Using the South University Online Library or the Internet, conduct research on measurement uncertainty. Based on your understanding, respond to the following:

·  How can precise and accurate measurement be achieved in spite of the inherent measurement uncertainty?  (You will want to define accuracy and precision).

· What are the types of measurement errors? Explain at least three such errors.

Discussion Question 1

Using the South University Online Library or the Internet, research elements and compounds. On the basis of your research, respond to the following:

· What are the differences between physical and chemical properties in chemistry?

· What are the differences between physical and chemical reactions in chemistry?

· What are the characteristics that make elements different from compounds? Give two examples of each that exist in the human body and explain their function.

 

Discussion Question 2

Using the South University Online Library or the Internet, research any one element. On the basis of your research, provide:

· What are isotopes and how are isotopes distinguished from one another?

· How can isotopes be used in medicine (be specific)? Describe in detail one example of how an isotope is used therapeutically, and describe another example of how an isotope is used diagnostically in medicine.

Discussion Question 1

Using the South University Online Library or the Internet, research any one element. On the basis of your research, provide:

· An analysis of the properties of the neutral atom and its most common ion.

· An explanation of the difference between stabilities of the selected neutral atom and its most common ion.

· A description of a process in the human body that is impacted differently by the neutral atom and its most common ion.

 

Discussion Question 2

Using the South University Online Library or the Internet, research elements and compounds. On the basis of your research, respond to the following:

· What are the differences between ionic and covalent compounds?

· Describe two ways that covalent compounds are used in the human body.

· How does the polarity of a molecule and a solvent impact solubility, and why might this be important?