Final answer:
The chemical symbol for krypton is Kr. The isotope of krypton with 48 neutrons has a mass number of 84 and is represented as ¹⁸⁴Kr.
Step-by-step explanation:
The chemical symbol for krypton is Kr. Krypton's atomic number is 36, which means it has 36 protons. To find out the mass number of this specific krypton isotope that has 48 neutrons, we add the 36 protons to the 48 neutrons, giving us a mass number of 84.
Therefore, the krypton isotope with 48 neutrons is represented as ¹⁸⁴Kr.