Chemical Reactions Do Not Change the Identity of the Participating

Multiple Choice

Chemical reactions do not change the identity of the participating atoms; all atoms present at the beginning of the reaction must be present at the end.Balance the chemical reaction by indicating the number of molecules necessary for each reactant and product: ________ Cl₂ + ________ NaBr à________ Br₂ + ________ NaCl.

A) 1; 1; 1; 1
B) 1; 2; 1; 1
C) 1; 2; 1; 2
D) 2; 2; 1; 2