Final answer:
Krypton is more stable than bromine due to its full valence shell, while bromine tends to react with other elements to gain an electron.
Step-by-step explanation:
Krypton and bromine are both chemical elements that are located on the periodic table. Krypton is a noble gas that is found in Group 18, period 4 while bromine is a halogen that is found in Group 17, period 4. In terms of chemical stability, krypton is more stable than bromine because it has a full valence shell with 8 electrons, making it less likely to react with other elements. On the other hand, bromine is less stable because it only has 7 electrons in its valence shell and tends to react with other elements to gain one more electron and achieve a full valence shell.
Learn more about Chemical stability and location on the periodic table