Calcium is one of the most common elements on earth. Calcium carbonates and sulphates simultaneously create magnificent stalactite caves, beautiful minerals, filigree mussel shells and of course our bones. And the slightest changes in the concentration of calcium ions are the basis for all of our senses.
Calcium belongs to the 2nd main group of the periodic table, the group of alkaline earth elements.
The elements of the 1st main group of the periodic table are called alkali elements.
The alkali elements or alkali metals include lithium, sodium, potassium, rubidium, cesium, and francium. Together with hydrogen, these form the 1st main group of the periodic table. Hydrogen is not one of the alkali metals because it has completely different properties under standard conditions, i.e. under normal pressure and room temperature.
Click here for an explanatory video on the YouTube channel where the Alkali metals are presented.
Click here for an explanatory video on the YouTube channel had to know chemistry, in which the alkaline earth metals are presented.
back to the periodic table
back to the start page for the year of the periodic table
to our brochure Chemistry of the Elements
published June 2019 with articles on 43 elements (7 MB, 160 pages)
Photos: Middle: Highly pure Ca crystals. From top left clockwise: Birefringent double spar; Huge selenite crystals from the Naica mine in Mexico (note the man at the bottom right in the picture, Photo: AES Van Driessche); Strongly curved plaster bell; Desert rose. (Sjoerd Harder, Univ. Erlangen-Nürnberg)
last modified: 10.05.2021 16:29 H from K.J.Schmitz