Answered: 35. When Nd-144 undergoes alpha…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

35. When Nd-144 undergoes alpha emission, it changes into

A.	Nd-140
B.	Ba-140
C.	Sm-140
D.	Ce-140

34. A radioactive substance will

A.	undergo nuclear reactions
B.	tend to glow in the dark
C.	feel warm or hot to the touch
D.	eventually disappear as it gives off radioactivity

33. A student has a silver-plated spoon where the silver has worn off in many areas. The student decides to try using a concentration cell to re-plate it by connecting the spoon to the cathode. What is the most likely result?

A.	it would work very well so that the spoon will look brand new
B.	nothing will happen unless the spoon is switched to the anode side
C.	a concentration cell only makes electricity
D.	the exposed areas may initially get plated but it would lose silver overall

32. The time needed to plate out 1.00 g Ni(Ni²⁺) using a 15-amp current is about

A.	3.7 minutes
B.	7.3 minutes
C.	210 minutes
D.	420 minutes

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