For example, uranium is atomic number 92, but there are two well-known isotopes, U-235 and U-238. U-235 is rare; less than 1 percent uranium is of the U-235 variety. U-235 has 143 neutrons and 92 ...

Organometallic molecules, which consist of a metal ion surrounded by a carbon-based framework, are relatively common for early actinide elements like uranium (atomic number 92), but they are scarcely ...

Niobium is a metal in groupVB of the periodic table with atomic number 41, an atomic weight of 92.91, and a density of 8.4 Mg/m 3. Its melting point is 2468 C, and it boils at 3300 C. The electronic ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...