Any of a group of metallic elements that includes beryllium, magnesium, calcium, strontium, barium, and radium. Because the alkaline-earth metals have two electrons in their outer shell, they react easily with other elements and are found in nature only in compounds.The alkaline earth metals are a group of chemical elements in the periodic table with very similar properties.
They are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure and readily lose their two outermost electrons to form cations with charge 2+ and an oxidation state, or oxidation number of +2.
| Name | Symbol | Atomic Number | Atomic Weight |
|---|---|---|---|
| Beryllium | Be | 4 | 9.012182 |
| Magnesium | Mg | 12 | 24.305 |
| Calcium | Ca | 20 | 40.078 |
| Strontium | Sr | 38 | 87.62 |
| Barium | Ba | 56 | 137.327 |
| Radium | Ra | 88 | -226.0254 |
Radium (Ra) Introduction Radium is a radioactive chemical element with the atomic number 88 in the periodic table. It’s the 84th most abundant substance found in Earth’s crust with an occurrence of about one part per trillion by weight. Being a member of the alkaline earth metals family of periodic table elements, this extremely rare … Read more
Barium is the fifth chemical element in the periodic table of elements with the atomic number 56. Being a member of the alkaline earth metals family, this soft metal is divalent, electropositive, and reactive, and supports the formation of many compounds with other chemical elements, especially carbon, oxygen, and sulphur. Due to its high reactivity, … Read more
Strontium is a chemical element with atomic number 38 in the periodic table. It’s the 15th most plentiful metal found in Earth’s crust with 0.034% ppm natural occurrence. Being a member of the alkaline earth metals group of the periodic table, this lithophile metallic element has two valence electrons present in the outermost shell. Strontium … Read more
Calcium is a chemical element with an atomic number of 20 in the periodic table of elements. It’s the fifth most plentiful metal found in Earth’s crust and the most abundant mineral in the human body. Being a member of the alkali earth metals family of periodic table elements, this chemical substance has two valence … Read more
Introduction Magnesium is a chemical element with the atomic number 12 in the periodic table. Born in the Universe from supernovas of aged stars, the occurrence of this element amounts to 2.5% of Earth’s crust, mainly as a part of the magnesium oxide compound. Magnesium is also found in Earth’s mantle. As a … Read more
Beryllium is a chemical element with the symbol Be and atomic number 4 in the periodic table of elements. It occurs in a quantity from 2 to 6 parts per million (ppm) in the Earth’s crust, i.e. 2.8 milligrams per kilogram of the elemental form of beryllium. This lightest member of the alkaline earth metals … Read more