Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope oganesson-294 have been detected.
What is the heaviest known element?
The heaviest element found in any appreciable amount in nature is uranium, atomic number 92. (The atomic number refers to the number of protons in an atom’s nucleus.) Beyond that, scientists must create new elements in accelerators, usually by smashing a beam of light atoms into a target of heavy atoms.
What is atomic mass of all elements?
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope.
What element has an atomic mass of 100?
| Fermium | |
|---|---|
| Atomic number (Z) | 100 |
| Group | n/a |
| Period | period 7 |
| Block | f-block |
What is the rarest element?
A team of researchers using the ISOLDE nuclear-physics facility at CERN has measured for the first time the so-called electron affinity of the chemical element astatine, the rarest naturally occurring element on Earth.
What is the rarest element in the universe?
Astatine is the rarest naturally occurring element.
What are the 1 to 30 elements?
Atomic Mass of First 30 Elements
| ATOMIC NUMBER | ELEMENT | ATOMIC MASS |
|---|---|---|
| 1 | Hydrogen | 1.008 |
| 2 | Helium | 4.0026 |
| 3 | Lithium | 6.94 |
| 4 | Beryllium | 9.0122 |
What is the Valency of 1 to 30 elements?
Valency of First 30 Elements
| Element | Atomic Number | Valency |
|---|---|---|
| Valency of Hydrogen | 1 | 1 |
| Valency of Helium | 2 | |
| Valency of Lithium | 3 | 1 |
| Valency of Beryllium | 4 | 2 |
What are the first 30 elements?
The first 30 elements of the periodic table and their symbols
| A | B |
|---|---|
| Lithium | Li |
| Beryllium | Be |
| Boron | B |
| Carbon | C |
What is the lowest atomic mass?
The elements of the periodic table sorted by atomic mass
| Atomic Mass | Name chemical element | number |
|---|---|---|
| 1.0079 | Hydrogen | 1 |
| 4.0026 | Helium | 2 |
| 6.941 | Lithium | 3 |
| 9.0122 | Beryllium | 4 |
What do you call the element from atomic number 57 70?
Lanthanides are atomic numbers 57–70. Actinides are atomic numbers 89–102.
How can I remember the first 20 elements?
The first 20 Elements of the Periodic Table: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulphur, Chlorine, Argon, Potassium, Calcium. Mnemonic: “Hi Helen, Listen B.B.C. News On Friday N(e)ight.
What is the most useless metal?
Protactinium. Though sandwiched between two very practical elements on the periodic table — thorium and uranium — protactinium is pretty much useless. The dearth of applications can primarily be attributed to the element’s rarity — it’s present at only a few parts per trillion in Earth’s crust.
What is the world’s most expensive element?
As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium. It is followed by caesium, iridium and palladium by mass and iridium, gold and platinum by volume. Carbon in the form of diamond can be more expensive than rhodium.
Which elemental power is the strongest?
The Top Ten
- Air/wind. Air control is the most strongest element there is.
- Fire. Fire is a really strong element and this sounds brutal but you can burn down bad people’s houses and burn people you don’t like.
- Lightning.
- Ice/frost.
- Earth.
- Darkness/shadow.
- Water.
- Magic.