Alkaline Earth Metals

By Group 7

General Information

Alkaline Earth Metals include Beryllium, Magnesium, Calcium, Strontium, Barium, Radium. They are shiny, silvery-white metals that can be very reactive. They are located in Group 2 of the Periodic Table, and are there because they are almost as reactive as their neighbors (Alkali Metals) in Group 1. Each element in this group has 2 Valence electrons. These metals react with Hydrogen, Oxygen, Nitrogen, the Halogen Family, and water. When reacting with water, they can be very explosive. They may even catch fire. Even after the fire has been put out, it can still reignite. Alkaline Earth Metals can be found in common places such as x-ray machines, toothpaste, vitamins, fireworks, motor oil detergent, and medicine.



Melting and Boiling Points

Beryllium’s melting point is 1,287 degrees Celsius and the boiling point is 2,970 degrees Celsius.

Magnesium’s melting point is 650 degrees Celsius and the boiling point is 1,107 degrees Celsius.

Calcium’s melting point is 839 degrees Celsius and the boiling point is 1,484 degrees Celsius.

Strontium’s melting point is 769 degrees Celsius and the boiling point is 1,384 degrees Celsius.

Barium’s melting point is 727 degrees Celsius and the boiling point is 1,897 degrees Celsius.

Radium’s melting point is 700 degrees Celsius and the boiling point is 1,737 degrees Celsius.

History

The Alkali Earth Metals were discovered starting in the early 15th century.They are named after their oxides, the Alkaline Earths. The Magnesium compound was discovered in 1618 by a farmer in England. The last element is called Radioactive Radium, which was taken out from Uraninite in 1898. Beryllium has been known since the time Ptolemaic Dynasty in Egypt. They thought that Beryllium was an aluminium silicate. Beryl was later found to contain an element when, in 1797, Louis-Nicolas Vauquelin dissolved aluminium hydroxide from beryl in an alkali. Calcium sulfate has been used to fix broken bones. Calcium wasn't isolated until 1808. Thomas Charles Hope discovered strontium 1793 when he realized that the ores on strontium contained new minerals, which he names “strontities”. Strontium was isolated in 1808 by Sir Humphry Davy.



Safety concerns

1. Alkaline Earth Metals can be very reactive. They can catch fire when they come in contact with moist air.

2. Alkaline Earth metals need to be stored under mineral oil to keep them away from moisture and oxygen.