Date Name Section Team Pre-Lab Study Questions 8 1. In what part of the atom do

Question

Date Name Section Team Pre-Lab Study Questions 8 1. In what part of the atom do alpha or beta particles originate? 2. Why is protection from radiation needed? 3. What are some medical uses of radiation? 4. Balance each of the following nuclear equations: a i 5. Calculate each of the following involving half-lives: a. The half-life of Na-24 is 15 h. If the initial activity of the sodium-24 is 6.4 mCi, what is its activity after 60. h. b. If a sample of I-123 with an activity of 4 kBq decays to an activity of 1 kBq in 26.4 h, what is its half-life? 89 Copyright © 2014 Pearson Education, Inc.

Explanation / Answer

Ans 1 :

The alpha particles have two atomic number and four mass number , so it originates in nucleus of the atom.

The beta particle is the high speed electron or positron , so it originates from the electrons.

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