This is approximately the sum of the number of protons and neutrons in the nucleus. The molar mass of any compound is the mass in grams of one mole of that compound. Where more than one isotope exists, the value given is the abundance weighted average. One mole of carbon dioxide molecules has a mass of 44.01g.
In both cases, it is the mass of 6.02 × 1023 molecules. Isotopes Atoms of the same element with different numbers of neutrons. The lightest chemical element is Hydrogen and the heaviest is Hassium.Separation and Concentration Purification Request. 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. The unity for atomic mass is gram per mol. Please note that the elements do not show. 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).
It is calculated by multiplying the atomic mass of each element in the compound by the number of atoms of that element in the compound, and then adding the. (The above picture of the periodic system is interactive - no need to download, just click on an element.