Q. 5.10 - An Introduction to General, Organic, and Biological Chemistry

Question

Supply the missing information in the following table:

Step-by-Step Solution

Answer

Required table is :

Medical use	Atomic symbol	Mass number	Number of protons	Number of neutrons
Cancer treatment	${}_{55}{}^{131}\mathrm{Cs}$	$131$	$55$	$81$
Brain scan	${}_{43}{}^{99}\mathrm{Tc}$	$99$	$43$	$56$
Blood flow	${}_{58}{}^{141}\mathrm{Ce}$	$141$	$58$	$83$
Bone scan	${}_{38}{}^{85}\mathrm{Sr}$	$85$	$38$	$47$
Lung function	${}_{54}{}^{131}\mathrm{Xe}$	$133$	$54$	$79$

Step 1 : Given information

We are given a table to complete.

Medical use	Atomic symbol	Mass number	Number of protons	Number of neutrons
Cancer treatment	${}_{55}{}^{131}\mathrm{Cs}$
Brain scan			$43$	$56$
Blood flow		$141$	$58$
Bone scan		$85$		$47$
Lung function	${}_{54}{}^{133}\mathrm{Xe}$

Step 2 : Simplify

As we know the symbol ${}_{\mathrm{Z}}{}^{\mathrm{Y}}\mathrm{X}$ represents :

X= atom

Y= mass number

Z= number of proton

Y-Z= number of neutrons

Therefore,

Required table with all data is : 

Medical Use	Atomic Symbol	Mass Number	Number of Protons	Number of Neutrons
Cancer treatment	${}_{55}{}^{131}\mathrm{Cs}$	$131$	$55$	$81$
Brain scan	${}_{43}{}^{99}\mathrm{Tc}$	$99$	$43$	$56$
Blood flow	${}_{58}{}^{141}\mathrm{Ce}$	$141$	$58$	$83$
Bone scan	${}_{38}{}^{85}\mathrm{Sr}$	$85$	$38$	$47$
Lung function	${}_{54}{}^{133}\mathrm{Xe}$	$133$	$54$	$79$