The elements with chemical symbols that are two letters, and the first letter is "S," are:
- Silver (Ag) - does not fit the criteria.
- Lead (Pb) - does not fit the criteria.
- Tin (Sn) - does not fit the criteria.
- Antimony (Sb) - fits the first letter "S."
- Mercury (Hg) - does not fit the criteria.
- Iron (Fe) - does not fit the criteria.
- Potassium (K) - does not fit the criteria.
- Tungsten (W) - does not fit the criteria.
So, the only correct response from your options is "tin and antimony" (Sn and Sb). However, only antimony starts with "S." The question appears to refer to elements starting with "S" but limits the options incorrectly.
The elements that fit your criteria would include:
- Sulfur (S)
- Silver (Ag) (not applicable as its symbol does not start with "S")
- Selenium (Se)
- Strontium (Sr)
Among your given responses, none fit the criteria perfectly, but "tin and antimony" includes one element starting with "S."
If you are selecting, the closest option is "tin and antimony," but it's important to clarify that only Antimony fits the "S" criteria.