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Flerovium

physical science Maturity 11-13 Next article →

Flerovium is a synthetic chemical element with the symbol Fl and atomic number 114. It is classified as a superheavy element and a transactinide. This means it sits beyond the actinide series on the periodic table. Flerovium is also the heaviest known member of the carbon group. Because it is man-made, it does not occur naturally in the world. It is extremely radioactive and highly unstable. This instability means its atoms break apart very quickly after they are created.

Next proton shell
Next proton shell

Scientists create flerovium through a process called direct synthesis. They use a particle accelerator to move nuclei at very high speeds. In one common method, researchers bombard a target of plutonium-244 with calcium-48 nuclei. When these nuclei collide, they may fuse to form a new, heavy nucleus. Flerovium can also be produced through radioactive decay. This happens when even heavier elements break down into smaller parts. Because these atoms are so rare, they can only be produced one atom at a time.

IBA nuclear shells
IBA nuclear shells

There are six known isotopes of flerovium. Isotopes are different versions of the same element with different mass numbers. These versions range in mass from 284 to 289. Most of these isotopes are very short-lived. For example, the most stable isotope has a half-life of about 2.1 seconds. A half-life is the time it takes for half of a sample to decay. One unconfirmed isotope might have a half-life of 19 seconds. This would be a very long time for an element in this part of the periodic table.

RUSMARKA-1660
RUSMARKA-1660

Researchers have long studied the concept of an "island of stability." In the 1940s and 1960s, scientists predicted that heavy elements would become too unstable to exist. However, the nuclear shell model changed this idea. This model suggests that protons and neutrons form shells inside the nucleus. Just like electron shells, these nuclear shells can be full. When a nucleus has "magic numbers" of protons or neutrons, it becomes more stable. Heiner Meldner calculated in 1965 that flerovium might be at the center of this island. He predicted that an isotope with 114 protons and 184 neutrons would be especially stable.

IBA nuclear shells
IBA nuclear shells

The discovery of flerovium happened in stages. In December 1998, a team at the Joint Institute for Nuclear Research in Dubna, Russia, saw the first signs. Led by Yuri Oganessian, they detected one atom that decayed with a lifetime of 30.4 seconds. A confirmed discovery followed in June 1999 when the team produced two atoms. Other labs later helped confirm these results. In 2009, researchers in Berkeley and Germany confirmed different isotopes. Finally, in 2011, the IUPAC officially recognized the discovery of flerovium. The name honors the Flerov Laboratory of Nuclear Reactions.

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RUSMARKA-1660

Flerovium has properties that surprise many chemists. As the heaviest member of the carbon group, it is expected to behave like lead. Lead is a metal, but flerovium shows unexpected volatility. Volatility refers to how easily a substance turns into a gas. Studies from 2007 to 2008 suggested it is much more volatile than other group 14 elements. Recent results show its reaction with gold is similar to copernicium. This suggests flerovium might even be a gas at standard temperature and pressure. Despite this, it still shows some metallic properties.

RUSMARKA-1660
RUSMARKA-1660

The study of flerovium connects to our understanding of nuclear physics. It helps scientists test the theories of nuclear shells and stability. By creating these superheavy atoms, we learn how the strongest forces in nature work. The search for the island of stability continues to drive new experiments. Every new isotope discovered brings us closer to understanding the limits of the periodic table. Flerovium remains a key piece of this scientific puzzle.

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