Question

regarding the formula al₂o₃ which of the following is accurate? a) the subscript 2 indicates that two atoms of oxygen are present in the substance. b) the chemical symbol al

Explanation:

First, let's analyze option A: In the formula $\ce{Al_{2}O_{3}}$, the subscript 2 is associated with aluminum (Al), not oxygen. It means there are 2 aluminum atoms, not 2 oxygen atoms. Since the problem's options are partially shown, but from the visible part, option A is incorrect. However, assuming we need to evaluate the given option A:

Step1: Analyze subscript in $\ce{Al_{2}O_{3}}$

In $\ce{Al_{2}O_{3}}$, subscript 2 is for Al, subscript 3 for O. So subscript 2 does not indicate 2 O atoms.

Step2: Conclude about option A

Option A's statement is wrong as subscript 2 refers to Al atoms, not O atoms.

(Note: Since the full options for B are not visible, but based on the visible part of A, we can determine A is incorrect. If more of option B was visible, we could analyze further, but with the given info, A is inaccurate.)

Answer:

Option A is inaccurate (as subscript 2 in $\ce{Al_{2}O_{3}}$ represents 2 Al atoms, not 2 O atoms). If we assume we need to state the accuracy of A, the answer is that A is incorrect.