Bond number
The characteristic of reactions that depends on valence electrons is the bond type.
In chemistry, a chemical bond could be;
Ionic
Covalent
The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.
When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.
 
        
             
        
        
        
Answer:
the changing tempure in rocks causing it to back apart 
 
        
             
        
        
        
Answer:
 1.08 x 10²⁵molecules
Explanation:
From the mole concept we know that ; 
       1 mole of any substance contains 6.02 x 10²³ molecules 
This number is the Avogadro's number. 
  So;
   18 mole of CH will contain: 
        Number of molecules of CH  = 18 x 6.02 x 10²³ = 1.08 x 10²⁵molecules
The number of molecules is therefore  1.08 x 10²⁵molecules
 
        
             
        
        
        
Answer:
It is a longitudinal wave.
Explanation:
Hope this helped.
 
        
                    
             
        
        
        
D. The particles are tightly packed together