Question

show the formation of NaCl from sodium and chlorine atom by the transfer of electrons

Answer 1

Atomic number of sodium(Na) is 11 atoms in last shell is 1.
atomic number of chlorine(cl) is 17 atoms in last shell is 7.
so Na gives 1 atom to chlorine.
This is complete transfer of electrons so it is ionic compound


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Answer 2

2Na+Cl2=2NaCl   2 is added on both the sides to balance the equation