Which mnemonic aids in remembering the chemical symbols of noble gases?

The correct answer is based on the mnemonic that specifically links to the noble gases and their chemical symbols. The phrase "Noble Gases Are HeNeArKrXeRn" includes the first letter of each noble gas in the periodic table: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn). This mnemonic effectively lists the elements in sequence while clearly identifying them as noble gases, making it an efficient tool for memorization.

The other options involve different subjects or categories entirely. "Every Good Boy Deserves Fun" is typically used to remember the lines of the treble clef in music, while "Please Excuse My Dear Aunt Sally" serves as a mnemonic for the order of operations in mathematics (parentheses, exponents, multiplication and division, addition and subtraction). Lastly, "King Philip Came Over For Great Soup" is used for the taxonomic ranking in biology (Kingdom, Phylum, Class, Order, Family, Genus, Species). These various subjects illustrate that the correct answer uniquely pertains to the specific task of recalling the noble gases' chemical symbols.