Question

the names of the elements whose symbols are si, p, mn, and s are respectively:

• silicon, potassium, magnesium, and sulfur.
• silicon, phosphorus, manganese, and sulfur.
• silicon, potassium, magnesium, and sodium.
• silicon, phosphorus, magnesium, and sulfur.
• silver, phosphorus, magnesium, and sulfur.

Explanation:

To solve this, we recall the element - symbol correspondences:

• The symbol \( \text{Si} \) corresponds to the element silicon.
• The symbol \( \text{P} \) corresponds to the element phosphorus.
• The symbol \( \text{Mn} \) corresponds to the element manganese.
• The symbol \( \text{S} \) corresponds to the element sulfur.

We then check each option:

• Option 1: Potassium has the symbol \( \text{K} \) and magnesium has the symbol \( \text{Mg} \), so this is incorrect.
• Option 2: Matches the correct element - symbol correspondences for \( \text{Si} \), \( \text{P} \), \( \text{Mn} \), and \( \text{S} \).
• Option 3: Potassium has the symbol \( \text{K} \), magnesium has the symbol \( \text{Mg} \), and sodium has the symbol \( \text{Na} \), so this is incorrect.
• Option 4: Manganese has the symbol \( \text{Mn} \), not magnesium (\( \text{Mg} \)) for the symbol \( \text{Mn} \), so this is incorrect.
• Option 5: Silver has the symbol \( \text{Ag} \), not \( \text{Si} \), so this is incorrect.

Answer:

B. silicon, phosphorus, manganese, and sulfur.