   Chapter 25, Problem 31PS

Chapter
Section
Textbook Problem

(a) Which of the following nuclei decay by decay? 3H 16q 20F 13N (b) Which of the following nuclei decays by decay? 238U 19F 22Na 24Na

(a)

Interpretation Introduction

Interpretation:

Out of the given nuclei that undergoes -10β has to be identified.

Concept-Introduction:

Beta decay series is two types such as beta minus decay and beta plus decay.

The neutron is converted to a proton in this process it create an electron is called beta minus decay radiation. Beta decay generally occurs in neutron-rich nuclei.

XZAXZ+1A'+e

Explanation

Given radioactive isotopes are,

3H,16O,20Fand13N

Isotope of hydrogen-3:

H13:Proton=1Neutron=2

Isotope of oxygen-16:

O816:Proton=8Neutron=168=8

Isotope of Flourine-20:

F920:Proton=9

(b)

Interpretation Introduction

Interpretation:

Out of the given nuclei that undergoes +10β has to be identified.

Concept-Introduction:

Beta decay series is two types such as beta minus decay and beta plus decay.

The neutron is converted to a proton in this process it create an electron is called beta minus decay radiation.

Then beta plus decay radiation, in this process proton converted to neutron it creates a positron. So these are called positron emission. Positron emission takes place when the ratio of neutron to proton is low. Or generally occurs in proton-rich nuclei.

XZAXZ1A'+e+

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