When Water freezes or begin to freeze, it molecules start to slow down enough that their attraction arrange into one shape till they melt again.
        
             
        
        
        
The answer for the following question is explained.
<u><em>Therefore the  number of electrons present with the values n = 5, l = 2, m = -2, s = +1/2 is</em></u><u> </u><u><em>one(1).</em></u>
Explanation:
Here;
n represents the principal quantum number 
l represents the Azimuthal quantum number
m represents magnetic quantum number
s represents spin quantum number
n = 5,
 l = 2,
 m = -2, 
s = +1/2
Here, it implies 5d orbital.
In the  5d  orbital, 10 electrons.
As the magnetic quantum number is -2, and so it can have 1 electron.
<u><em>Therefore the  number of electrons present with the values n = 5, l = 2, m = -2, s = +1/2 is</em></u><u> </u><u><em>one(1)</em></u>
 
        
             
        
        
        
<span>
some elements have their outer electrons more tightly bound than
others. Those who have less tightly bound electrons are more reactive.
After this it gets more complex in explaining why they are bound with
different strengths. </span>
        
                    
             
        
        
        
Answer: assume pathogens are present and treat the samples accordingly
Explanation:
When investigators are unable to conclusively ascertain the source of a biological sample found at a crime scene, the correct thing to do is to treat it as if pathogens are present in it and handle it according to set rules on how to handle pathogens. 
This is done to ensure that if a pathogen is indeed present, it would not cause a health emergency by infecting those who come in contact with the samples at the scene.