Astatine is the rarest naturally occurring element.
Ununennium, or element 119, is a predicted chemical element. Its symbol is Uue. Ununennium and Uue are substitute names made by the IUPAC, (meaning "one-one-nine-ium" in Latin) until permanent names are made. Ununennium is the element with the smallest atomic number that has not been created yet.
But water isn't that rare in the cosmos. Water is made of hydrogen and oxygen. Hydrogen is by far the most abundant element, and Oxygen is the third most abundant. Number two is helium, which doesn't react chemically, so water is really common.
The rarest mineral on Earth is kyawthuite. Only one crystal, found in the Mogok region of Myanmar, is known to exist. Caltech's mineral database (opens in new tab) describes it as a small (1.61-karat) deep orange gemstone that the International Mineralogical Association (opens in new tab) officially recognized in 2015.
Astatine is the rarest naturally occurring element. The total amount of astatine in the Earth's crust (quoted mass 2.36 × 1025 grams) is estimated by some to be less than one gram at any given time.
The first 117 elements on the periodic table were relatively normal. Then along came element 118. Oganesson, named for Russian physicist Yuri Oganessian (SN: 1/21/17, p. 16), is the heaviest element currently on the periodic table, weighing in with a huge atomic mass of about 300.
Roentgenium was in fact discovered 10 years earlier on December 8, 1994, by a team of 13 nuclear physicists working at the Gesellschaft für Schwerionenforschung at Darmstadt in Germany carried out an experiment, bombarding a target of 209Bi with 64Ni ions.
As of April 2022, synthesis has been attempted for every element up to and including unbiseptium (Z = 127), except unbitrium (Z = 123), with the heaviest successfully synthesized element being oganesson in 2002 and the most recent discovery being that of tennessine in 2010.
In short, the answer is no. The statement 'diamond is an element' is misleading as carbon itself is an element. While a diamond is composed of 100% of carbon with no other elements involved, it is not an element but simply an allotrope of the element carbon.
The first elements — hydrogen and helium — couldn't form until the universe had cooled enough to allow their nuclei to capture electrons (right), about 380,000 years after the Big Bang.
Scientific element: Francium
The most expensive and second rarest natural element.
The 17 rare earth elements are: lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc), and yttrium (Y).
Iridium is one of the rarest elements on Earth. It is found uncombined in nature in sediments that were deposited by rivers. It is commercially recovered as a by-product of nickel refining. A very thin layer of iridium exists in the Earth's crust.
Rare. The abundance of tungsten in the Earth's crust is thought to be about 1.5 parts per million. Tungsten or Wolfram is considered to be one of the more rare elements.
The name is from the Greek word for artificial, since technetium was the very first man-made element, yet despite the name, technetium is found naturally albeit in tiny traces.
Roentgenium is too rare to have any commercial or industrial application. The most stable isotope of Roentgenium has a half-life of a fraction of a thousandth of a second.
The radioactivity of radium then must be enormous. This substance is the most radioactive natural element, a million times more so than uranium. It is so radioactive that it gives off a pale blue glow. Yet it would still take the Curies another three years to produce a pure radium salt.
Can you name the hardest element? It's an element that occurs naturally in pure form and has a hardness of 10 on the Mohs scale. Chances are you have seen it. The hardest pure element is carbon in the form of a diamond.
Meet nihonium (Nh), moscovium (Mc), tennessine (Ts), and oganesson (Og) -- elements 113, 115, 117, and 118. The four new elements have just been given names.
Gold easily tops these numbers with a density of 19.3 g/cm3. However, this does not make it the heaviest element, and not even the heaviest precious metal, an honour which goes to platinum with a density of 21.45 g/cm³. The elements osmium, iridium, rhenium, neptunium and plutonium are also heavier than gold.
He suffers from a rare genetic mutation called Cloves Syndrome. It was first discovered in 2006 and only 130 people have been diagnosed with it world wide. He is a one in 50 million little boy. Cloves syndrome patients have a higher risk of blood clots and cancer of the kidney.
If you happened to fall into the INFJ personality type, you're a rare breed; only 1.5 percent of the general population fits into that category, making it the rarest personality type in the world. When it comes to physical attributes, this is the rarest hair and eye color combination in humans.
Ryan Holiday on Twitter: ""The rarest of human qualities is consistency." — Jeremy Bentham" / Twitter.