1 Answer

Prajwal Udupa · Answer 1 · 2020-03-04T07:51:10+0000

Answer:

2

Step-by-step explanation:

The formula for the most stable form of oxygen is O₂, so the subscript is 2.

However, there is a less stable form of oxygen called ozone. Its formula is O₃, so the subscript for ozone is 3.

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