Nichum

Nichum is a rare and highly radioactive element with the atomic number 107 and the symbol Nh. It was first synthesized in 2010 by a team of Russian and American scientists at the Joint Institute for Nuclear Research in Dubna, Russia. Nichum is part of the transactinide series of elements, which are synthetic and have no stable isotopes.

The most stable known isotope of nichum is nihcium-286, which has a half-life of approximately 11 seconds. Due to its extreme radioactivity, nichum has no practical applications and is primarily of interest to scientists studying the properties of superheavy elements.

Nichum is named after the Japanese word "nichido," which means "one seventh." This name was chosen to reflect the element's position in the periodic table, as it is the seventh element in the seventh period. The discovery of nichum was a significant milestone in the field of nuclear chemistry, as it expanded the known periodic table and provided insights into the stability of superheavy elements.