Question

An illustration shows the periodic table of elements with elements arranged in increasing order of atomic number in 18 columns (groups) and 7 rows (periods).
Which comparison is correct?

(1 point)
Responses

PH3 is a stronger acid than NH3.
PH 3 is a stronger acid than NH 3 .

H2S is a stronger acid than HCl.
H 2 S is a stronger acid than HCl.

NH3 is a stronger acid than HF.
NH 3 is a stronger acid than HF.

HF is a stronger acid than HCl.
HF is a stronger acid than HCl.
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Answer 1

Among the options provided, the correct comparison based on acid strength is:

**PH3 is a stronger acid than NH3.**

Here's a brief explanation for clarity:

1. **PH3 (phosphine) vs. NH3 (ammonia)**: PH3 is a weaker base than NH3, which means that it can more readily donate protons (H+) in solution, making it a stronger acid in comparison.

2. **H2S (hydrogen sulfide) vs. HCl (hydrochloric acid)**: HCl is a stronger acid than H2S.

3. **NH3 (ammonia) vs. HF (hydrofluoric acid)**: HF is a much stronger acid than NH3.

4. **HF (hydrofluoric acid) vs. HCl (hydrochloric acid)**: HCl is a stronger acid than HF.

Thus, the only correct comparison based on these statements is the first one.