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Ch.21 - Nuclear Chemistry

Chapter 21, Problem 12b

Give the symbol for (b) a beta particle.

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Welcome back everyone in this example we need to determine which among the following is the correct symbol for a beta particle. We want to recall that a beta particle has no atomic mass And it can be represented by an electron where we would recall that it has a mass number of zero and an atomic number of -1. Now looking at our answer choices, we can already rule out choices D. And C. So this should have said D D N. C. Which are incorrect because as we can see they have either the incorrect mass number for choice C. Whereas in choice D we have the incorrect atomic number being plus one where it should be negative one. Now between choices A and B, we want to also recognize that beta particles can be represented by the symbol beta. So these are both representative of beta particles, meaning that our final answer we specifically want to recognize is our choice B. Where we have the beta particle with a negative charge. Since we know that it has a negative atomic number. So we can rule out choice A. And that confirms that choice B is the only correct choice to complete this example as the correct symbol for a beta particle. I hope everything I reviewed was clear. If you have any questions, please leave them down below and I will see everyone in the next practice video