Question

2. Which oxidation number change indicates the most number of electrons gained by a species in a redox reaction?

+6 to +3
+3 to +7
0 to +4
+1 to 0

Answer 1

Answer: +6 to +3

Step-by-step explanation:

If something gains an electron, the charge will decrease by -1 because electrons have a negative charge. If it loses an electron, its charge will increase by +1.

+6 to +3 ➜ Gained 3

+3 to +7 ➜ Lost 4

0 to +4 ➜ Lost 4

+1 to 0 ➜ Gained 1

Using this information, the species with the charge change of +6 to +3 gained the most electrons in a redox reaction.