An electric current is conduced by the solution of NaCI
I hope that's help ! 
 
        
             
        
        
        
Answer:
PROTONS
Explanation:
Isotopes of the same element have the same chemical properties because they have the same number of PROTONS (and electrons). 
 
        
             
        
        
        
Answer: Reducing agent in the given reaction is  .
.
Explanation:
A reducing agent is defined as an element which tends to lose electrons to other element leading to an increase in its oxidation number.
In the given reaction, oxidation state of sulfur in  is +2 and
 is +2 and  has 0 oxidation state.
 has 0 oxidation state.
In  oxidation state of S is 2.5 and in
 oxidation state of S is 2.5 and in  oxidation state of I is -1.
 oxidation state of I is -1.
Since, an increase in oxidation state of S is occurring from +2 to +2.5. Hence, it is acting as a reducing agent.
Thus, we can conclude that reducing agent in the given reaction is  .
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Answer: When you burned the skewer tip coated with copper sulfate the green light is emitted 
Explanation:
when the copper is burned it makes a green light