Answer:
If the solution is not in contact with air, nothing will happen. If the solution is in contact with air, it will be not a reaction between copper, water and sodium chloride..
in the end there will be no reaction
<em>Answer:</em>
- The atom have a full valence electron shell.
<em>Explanation:</em>
- My question is that why covalent bonds take place?
Every atoms tends to from bond with another atoms in order to get nearest electronic configuration of nobel gases. They become stable when their valence shell become complete. So when covelant bond forms between atoms, share electrons to each other and stabilize themselves.
Answer:

Explanation:
The valance of magnesium atom is
While the valence of nitrogen atom is 
Let us first write the first half-reactions

The second half reaction is

Adding the above two reactions and writing the final reaction, we get -

The balance equation is

There are 7 periods in the modern periodic table
Answer:
C.
The pan will be the same temperature as the stove.
Explanation: