Yes, all the elements (natural or artificial) are contained in the periodic (Mendeleev) table of the elements.
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Yes, the periodic table organizes the 109 known elements based on their atomic number, electron configuration, and chemical properties. It helps scientists predict the behavior of elements and identify patterns in their characteristics.
The first atomic number appeared on the periodic table in August 1982. The first atom of the element meitnerium had the atomic number 109. The isotope of element 109 has an atomic mass of 266.
If there are 109 different elements, there must be 109 different atomic numbers since each element has a unique atomic number that distinguishes it from other elements on the periodic table.
Elements 104-109 on the periodic table do not have official names because they were discovered through different research groups and have not yet been confirmed by the International Union of Pure and Applied Chemistry (IUPAC). The naming process for new elements involves a thorough review by IUPAC to ensure that the discovery meets their criteria before an official name can be assigned.
As of our current knowledge, there are 118 known elements on the periodic table, each with a specific number of electrons. The electron is a fundamental particle, and there are trillions upon trillions of electrons present in the universe, making it impossible to provide an exact count.