The same or what I don't understand?
Answer:
bonds within the nucleus of reactants atoms are broken and rearranged to form new product atoms
Answer:
Any device that contains electronic parts
Answer:-
Ca-Cl
Explanation:-
The more the difference in electronegativity more the polar bond.
In case of Ca-Cl the difference = 3.16 - 1= 2.16
It is more than all the other combinations given.
Hence Ca-Cl is the most polar covalent bond.