Here's why:
* Alkaline Earth Metals: These are elements found in Group 2 of the periodic table. They are known for their reactivity.
* Atomic Mass: The atomic mass of an element is the average mass of its atoms, measured in atomic mass units (amu). Radium has an atomic mass of approximately 226 amu, which is close to 88.
However, it's important to note that 88 is the atomic number of Radium, not its atomic mass. Atomic number represents the number of protons in an atom's nucleus.
