5. With 47 proton and 46 electron, the symbol becomes, d. Ag+ 6.radiation requir

Question

5. With 47 proton and 46 electron, the symbol becomes,

d. Ag+

6.radiation required lead or thick concreate is,

c. gamma rays

7. radioactive decay follows first order kinetics

decay constant k = ln2/t1/2 = 0.693/8 d = 0.0866 d-1

ln[C after 40 days) = ln(initial) - decays constant x time

                              = ln(32) - 0.0866 x 40

[C after 40 days) = 1 mci                           

c) 1 mci

8. pH in the body is maintained by,

a) weak acid and its salt

9. The solution is acidic can be seen by,

d) none

10. Inspiration (in) and expiration (out)

a. Inspiration

b. inspiration

c. expiration

Explanation / Answer

5. The symbol for an ion with 47 protons and 46 electrons is a) AP b) T 6. What type of radiation requires protective shield of lead or thick concrete? a) alpha particles b) beta particles c) gamma particles d) none 7. A sample of radioactive 1-131 has a half-life of 8 days. If the initial activity of the 1-131 is 32 mci, what would be the activity after 40 days? a) 2 mCi b) 8 mCi c)1 mCi d) 0.5 mCi 8. The activity (or function) of enzyme in the body is most effective at a certain (optimum) pH An extreme change in the pH of the enzyme's environment can diminish (or greatly reduce) its activity A chemical system that maintains pH in the body can be represented by one of the following a weak acid and its salt a) c) a strong acid and its salt b) calcium carbonate d) water e) none 9. Which of the following indicates a liquid sample is acidic? The liquid turns litmus paper from red to blue a) pH of liquid is 8.3 c) The liquid is red b) d) None 10. Use the word insalration or explration to describe the part of the breathing cycle that occurs as a result of each of the following: a. The volume of the lung increases . pressure within the lungs is greater than that of the atmosphere c. The diaphragm relaxes, decreasing the thoracic cavity

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.