discussion post and responces

Chemistry
1)8.1- What are the three major types of radiation?
You need to respond to my questions and to at least four classmates substantially over three days in a manner that furthers the discussion. Some ideas for responses might be:
1. Add information that your classmate didnâ€t include in his/her post.
2. Go a step further and explain the reasons why the nucleus is unstable in each type of decay.
3. Give a specific example of a an isotope decaying by one of these types of radioactive decay and show the decay with a balanced nuclear reaction.
2)8.2- What is the half-life of a radioactive isotope?
You need to respond to my questions and to at least four classmates substantially over three days in a manner that furthers the discussion. Some ideas for responses might be:
1. Add information that your classmate didnâ€t include in his/her post.
2. Go a step further explain what factors can affect the half-life of an isotope is related to activity and/or decay constant for an isotope.
3. Give a specific example of a calculation where the half-life is calculated from the decay constant, or the decay constant is calculated from the half-life.
Psychology
3)8.1-Can physical symptoms be caused by thoughts? Explain why it is or isnâ€t possible. Be sure to provide justification from the readings for your reasoning.
4)8.2- Would it be better to cope with stress by changing thoughts, behaviors, or physiological responses? Would it be better to cope with stress by changing a combination of all three? Why would it be better to change just one or all three? Provide justification.

You also must make 4 replies to students on three different days but the initial posts are due Wednesday May 14 at midnight. The responses must be done by Friday.

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