19,916
edits
Changes
no edit summary
: The most [[Stable Isotope|stable isotope]] of [[Radium]] has 138 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 226.
: An [[atom]] of [[Radium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]].
: [[Radium]] [[ion]]s have lost two [[electron]]s to become [[Positive ChargedCharge|positively charged]].
====Properties====
: [[Radium]] is the most [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]].