What is the atomic mass of Neptune?
The isotopes of neptunium range in atomic weight from 219.032 u (219Np) to 244.068 u (244Np), though 221Np and 222Np have not yet been reported.
What is the 93 element?
neptunium
Between those planets sits Neptune, and the gap between the two elements leaves a space for their relatively unsung cousin, neptunium – element number 93 in the periodic table.
What is the 92 element?
Uranium
Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium has the highest atomic weight (19 kg m) of all naturally occurring elements.
Which is the rarest element on the Earth?
element astatine
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.
How is NP 237 produced?
Neptunium 237 is routinely produced in nuclear reactors as a result of the neutron irradiation of uranium 235 and uranium 238, the two most common constituents of nuclear fuel. It is also a decay product of americium 241. Large quantities of neptunium 237 are found in spent nuclear fuel.
Why is element 93 named neptunium?
neptunium (Np), radioactive chemical element of the actinoid series of the periodic table that was the first transuranium element to be artificially produced, atomic number 93. The element was named after the planet Neptune, which is the first planet beyond Uranus.
What is no periodic table?
nobelium (No), synthetic chemical element of the actinoid series of the periodic table, atomic number 102. The element was named after Swedish chemist Alfred Nobel.
What element is named after Albert Einstein?
Einsteinium
| Discovery date | 1952 |
|---|---|
| Discovered by | Albert Ghiorso and colleagues |
| Origin of the name | Einsteinium is named after the renowned physicist Albert Einstein. |
| Allotropes |
What is in a uranium bomb?
The force from the blast is directed inward, compressing the pit and bringing its atoms closer together. Once dense enough to reach the critical mass, neutrons are injected, initiating a fission chain reaction and producing an atomic explosion.
What period is chlorine in?
3
Fact box
| Group | 17 | −101.5°C, −150.7°F, 171.7 K |
|---|---|---|
| Period | 3 | −34.04°C, −29.27°F, 239.11 K |
| Block | p | 0.002898 |
| Atomic number | 17 | 35.45 |
| State at 20°C | Gas | 35Cl, 37Cl |
What element is the heaviest?
uranium
The heaviest naturally stable element is uranium, but over the years physicists have used accelerators to synthesize larger, heavier elements. In 2006, physicists in the United States and Russia created element 118.
Which is the lightest metal in the world?
Lithium is considered to be the lightest or the least dense metal on earth with a density of 0.534 g/cm3.
