Question

A plot of no.of neutrons (n) against the no.of protons (p) of stable nuclei exhibits upward deviation from linearity for atomic number Z > 20. For an unstable nuclei n/p < 1, the possible mode(s) of decay is : 
1. Beta Emission 
2. neutron emission
3. Orbital Capture
4. Positron Emission ​

Answer 1

Answer:

n/p ratio should increase and for that number of neutron should increase and proton should decrease.

oe¹+ 1P¹→ 1 n0. (K-electron capture)

1P ¹→ 1n0+ 1β0. (β+decay)

In both cases the number of neutron increase by 1 and proton decrease by 1.

option:- 3,4

Explanation:

i hope it will be the answer......

Answer 2

 

$\: \: \boxed{\boxed{\rm{\mapsto \: \: \: Question }}}$

A plot of no.of neutrons (n) against the no.of protons (p) of stable nuclei exhibits upward deviation from linearity for atomic number Z > 20. For an unstable nuclei n/p < 1, the possible mode(s) of decay is : 

1. Beta Emission 

2. neutron emission

3. Orbital Capture

4. Positron Emission

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$\: \: \boxed{\boxed{\rm{\mapsto \: \: \: Firstly \: let's \: understand \: the \: question \: first}}}$

In the question it is given that

• A plot of no.of neutrons (n) against the no.of protons (p) of stable nuclei exhibits upward deviation from linearity for atomic number Z > 20.

And the four options are given in which we need to find the -

• an unstable nuclei n/p < 1, the possible mode(s) of decay ?

1. Beta Emission

2. neutron emission

3. Orbital Capture

4. Positron Emission

 

_______________________________________________

$\: \: \boxed{\boxed{\rm{\mapsto \: \: \: Solution }}}$

3. Orbital Capture

4. Positron Emission 

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$\: \: \boxed{\boxed{\rm{\mapsto \: \: \: Step \: by \:Step \: Solution }}}$

~ it is given that n/p < 1 which mean number of neutron is less than proton or we can say proton is large in numbers

$\: \: \huge\boxed{{\rm{n < p }}}$

so let's check the possible modes of decay !

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1) Beta Emission 

• its happens when neutron change into proton .

$\Longrightarrow \sf {_0} n ^{1} \rightarrow{_1} {p}^{1} + {_ - {_1}}e ^{0}$

• By which n/p will further decrease .

• therefore , unstable .

• beta emission is not the possible mode of decay .

$\begin{gathered}\begin{gathered}\begin{gathered}\\\;\underline{\boxed{\tt{\odot\;\;Hence,\; Beta \: Emission is\;\bf{\red{not \: possible}}}}}\end{gathered} \end{gathered}\end{gathered}$

2) Neutron Emission

• in Neutral Emission neutron will emit .

• hence , it will decrease neutron in n/p .

• therefore , unstable .

• Neutron Emission is not the possible mode of decay .

$\begin{gathered}\begin{gathered}\begin{gathered}\\\;\underline{\boxed{\tt{\odot\;\;Hence,\; Neutron \: Emission is\;\bf{\red{not \: possible}}}}}\end{gathered} \end{gathered}\end{gathered}$

3) Orbital Capture

• its happens when proton capture the electron and changes into neutron .

$\Longrightarrow \sf {_1} p ^{1} + {_ - {_1}} {e}^{0} \rightarrow {_0}n^{1}$

• By which n/p will further increase .

• therefore , stable .

• Orbital Capture is the possible mode of decay .

$\begin{gathered}\begin{gathered}\begin{gathered}\\\;\underline{\boxed{\tt{\odot\;\;Hence,\; Orbital \: Capture is\;\bf{\green{possible}}}}}\end{gathered} \end{gathered}\end{gathered}$

4. Positron Emission 

• it happens when proton changes into neutron .

$\Longrightarrow \sf {_1} p ^{1} \rightarrow {_0}n^{1} + {_ + {_1}} {e}^{0}$

• if proton will change into neutron then proton will decrease and neutron will increase .

• mean that n/p will further increase .

• therefore , stable .

• Positron Emission is the possible mode of decay .

$\begin{gathered}\begin{gathered}\begin{gathered}\\\;\underline{\boxed{\tt{\odot\;\;Hence,\; Positron \: Emission  is\;\bf{\green{possible}}}}}\end{gathered} \end{gathered}\end{gathered}$