Chemistry 101L - Kentucky Department of Education

These are the elements Li, Na, K, Rb, Cs, and Fr. Alkaline Earth Metal. One of the elements from Column 2 (IIA) of the Periodic Table. These are the elements Be, Mg, Ca, Sr, Ba, and Ra. Allotropes. Forms of an element that have different properties from each other. The word "form" is ambiguous. ................
................