Final answer:
D) Sr(NO₃)₂.The correct formula for strontium nitrate is Sr(NO₃)₂, reflecting the need for two nitrate ions to balance the 2+ charge of one strontium ion.
Step-by-step explanation:
The correct compound formula for strontium nitrate is D) Sr(NO₃)₂. In ionic compounds, the cation (positive ion) and anion (negative ion) must combine in such a way that the positive and negative charges balance to produce a neutral compound. Strontium has a 2+ charge (Sr²⁺) and the nitrate ion has a 1- charge (NO₃⁻). Therefore, two nitrate ions are needed to balance the 2+ charge of one strontium ion, resulting in the formula Sr(NO₃)₂.
The correct compound formula for strontium nitrate is Sr(NO₃)₂ (option D).
Strontium (Sr) is a Group 2A element with a 2+ charge, while nitrate (NO₃) is a polyatomic ion with a 1- charge. To balance the charges of these ions in the compound, we need two nitrate ions for every strontium ion. Therefore, the formula for strontium nitrate is Sr(NO₃)₂.