Chapter 24: 24.116 CP (page 1106)

Which isotope in each pair is more stable? Why?
(a) ${}_{55}^{140}{Cs}$ or ${}_{55}^{133}{Cs}$ (b) ${}_{35}^{79}{Br}$ or ${}_{35}^{78}{Br}$
(c) ${}_{12}^{28}{Mg}$ or ${}_{12}^{24}{Mg}$ (d) ${}_{7}^{14}N$ or ${}_{7}^{18}N$

Short Answer

Expert verified

a) ${}_{55}^{133}{Cs}$ is more stable isotope

b) ${}_{35}^{79}{Br}$ is more stable isotope

c) ${}_{12}^{24}{Mg}$ is more stable isotope

d) ${}_{7}^{14}N$ is more stable isotope

Step by step solution

Definition of Isotope

Isotopes are chemical elements that have the same number of protons and electrons but differ in the number of neutrons they have.

Determining more stable isotope

a) ${}_{55}^{133}{Cs}$

In comparison to ${}_{55}^{133}{Cs}$ , the N/Z ratio ofdata-custom-editor="chemistry" ${}_{55}^{140}{Cs}$ is higher.

Determining more stable isotope

b) ${}_{35}^{79}{Br}$

In comparison to ${}_{35}^{79}{Br}$ , this isotope has an even number of neutrons.

Determining more stable isotope

c) ${}_{12}^{24}{Mg}$

Its N/Z ratio is equal to one.

Determining more stable isotope

d) ${}_{7}^{14}N$

Its N/Z ratio is equal to one.

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Which isotope in each pair is more stable? Why?
(a) ${}_{55}^{140}{Cs}$ or ${}_{55}^{133}{Cs}$ (b) ${}_{35}^{79}{Br}$ or ${}_{35}^{78}{Br}$
(c) ${}_{12}^{28}{Mg}$ or ${}_{12}^{24}{Mg}$ (d) ${}_{7}^{14}N$ or ${}_{7}^{18}N$

Short Answer

Step by step solution

Definition of Isotope

Determining more stable isotope

Determining more stable isotope

Determining more stable isotope

Determining more stable isotope

One App. One Place for Learning.

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Which isotope in each pair is more stable? Why?(a) Cs55140or Cs55133 (b)Br3579or Br3578(c) Mg1228or Mg1224 (d) N714orN718

Short Answer

Step by step solution

Definition of Isotope

Determining more stable isotope

Determining more stable isotope

Determining more stable isotope

Determining more stable isotope

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Making Measurements

Ionic and Molecular Compounds

Nuclear Chemistry

The Earths Atmosphere

Organic Chemistry

Kinetics

Study anywhere. Anytime. Across all devices.

Which isotope in each pair is more stable? Why?
(a) ${}_{55}^{140}{Cs}$ or ${}_{55}^{133}{Cs}$ (b) ${}_{35}^{79}{Br}$ or ${}_{35}^{78}{Br}$
(c) ${}_{12}^{28}{Mg}$ or ${}_{12}^{24}{Mg}$ (d) ${}_{7}^{14}N$ or ${}_{7}^{18}N$