What is the heaviest chemical element?
Uranium the heaviest element :
Uranium is the heaviest element that can be found in its natural state. But Mendeleev’s periodic table has been enriched over time by increasingly heavy elements created artificially.
What is the? It is without question , or more exactly its 1 H , which contains only a and an , two particles which cannot be deconstructed into smaller particles.
But what is the opposite, the heaviest element? By convention, theof an is determined by its , that is to say the number of protons present in its nucleus.
In reality, the atomic mass depends on the number of(protons and ), which means that certain isotopes of an element with a lower atomic number may have an atomic mass greater than that of heavier elements.
Uranium, the heaviest chemical element in its natural state
Until 1940, the heaviest known chemical element was, atomic number 92. It is still the heaviest that can be found in nature, although it decays very slowly over several billion years.
Most abundant Isotope of uranium :
The most abundant is its isotope 238, which contains 92 protons and 146 neutrons.
The isotope 238 of, with 82 protons and 126 neutrons, is the heaviest of all existing stable nuclides.
But in 1940, chemists succeeded in producing the isotope 239 ofby bombarding 238 with neutrons.
The heavier element of the periodic table:
Today,, atomic number 118, is officially the heaviest chemical element on the . Synthesized in 2002, it is very unstable and disintegrates in less than a millisecond.
All itsand chemical properties are therefore theoretical and derive from calculation models.
Thecompletes the seventh line of the periodic table and some consider that and that it’s impossible to go beyond.
Islands of stability :
Others speculate on the contrary on the possibility of an eighth line, thanks in particular to the existence of “islands of stability”, where certain superheavy isotopes could remain longer.