Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 2, Problem 1RQ
Summary Introduction

To determine:

The number of neutrons present in oxygen, hydrogen and nitrogen.

Introduction:

The smallest unit of an element is called as an atom. An atom is comprised of “protons, neutrons, and electrons”. Each atom present in an element contains all the chemical properties of an element. The whole charge of an atom is neutral, because of the presence of positively charged particles called as proton and negatively charged particles called electrons.

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Iodine has 37 known isotopes.  Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct? A) The isotopes of iodine have between 55 and 91 protons. B) An atom of iodine can have between 55 and 91 neutrons. C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary. D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.
Name three specific examples of multipolar neutrons and state where each is found in the body
The decay of an isotope element follows a first-order reaction. Assuming that you start with 964 mg of the isotope element sample, after 39.4 hours of decay, you find that there is 275 mg of the sample remaining. What is the half-life time of this reaction?

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