Q21PE - College Physics (Urone)

Question

Electron capture by ⁷Be

Step-by-Step Solution

Answer

The β^- Decay equation of ⁷Be is \(_4^7B{e_3} + {e^ - } \to _3^7L{i_4} + {\nu _e}\).

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What is atomic mass number ?

The amount of matter contained in an atom of an element is called its atomic mass.

Formula to be used

A = N + Z

 

Where A is atomic mass number

Z is the number of protons in a nucleus

X is the symbol for the element

 

In the expression below:

\(_Z^A{X_N}\) 

 

Z is the number of protons in a nucleus

X is the symbol for the element

To determine the Electron capture decay equation of

⁷Be

We know that 

A = N + Z

 

Where A is atomic mass number

 

The atomic mass of \(_4^7B{e_3}\) is 7 and

A = 7 Z = 4 N = 3

 

Thus,

 

A = 7 N = 3 - ( - 1) = 4 Z = A - N = 7 - 4 = 3

 

Therefore, electron capture Decay equation of ⁷Be is \(_4^7B{e_3} + {e^ - } \to _3^7L{i_4} + {\nu _e}\).