Final answer:
The neutral chemical formula of Strontium Nitrate contains two nitrate (NO3-) groups.
Step-by-step explanation:
The neutral formula of Strontium Nitrate is Sr(NO3)2. According to the formula, the compound contains two nitrate (NO3-) groups. When dealing with polyatomic ions in a formula, the subscript outside the parentheses tells us the number of such ions present. Thus, we have (B) 2 nitrate groups in the neutral chemical formula of Strontium Nitrate.