![]() (The above picture of the periodic system is interactive - no need to download, just click on an element. Now available: history of the periodic tableĬhoose elements by name, by atomic number, by symbol, by massĬlick here for the history of the periodic table.Ĭlick here to download a PDF version from that periodic table An interactive, printable extended version of the Periodic table of chemical elements of Mendeleev (who invented the periodic table). The atomic number of each element increases by one, reading from left to right. The periodic table lists the atomic mass of carbon as 12. Period A horizontal row in the periodic table. The molar mass of any substance is its atomic mass, molecular mass, or formula mass in grams per mole. Phone: +31 152 610 900 chemical element contains a link to a page that explains its chemical properties, health effects, environmental effects, application data, an image and also information of the history/inventor of each element. Members of a group typically have similar properties and electron configurations in their outer shell. ![]() Barium 139, for example, has a half-life of just 68 minutes before it breaks down to form lanthanum 139 - not suitable for dating anything older than a loaf of bread. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Lanthanum and the element before it in the periodic table, barium, have an exotic relationship. Element Magnesium (Mg), Group 2, Atomic Number 12, s-block, Mass 24.305. Periodic Table of Videos Created by video journalist Brady Haran working with chemists at The University of Nottingham. Separation and Concentration Purification Request History textPodcasts The Naked Scientists.Plant Inspection & Process Optimalisation.
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