The atomic number of einsteinium is 99. It also has 99 protons and 99 electrons in its nucleus.
Einsteinium is an element on the bottom of the periodic table with a symbol of Es. It is classified as an actinide element.
It has 19 isotopes with different neutron counts and atomic masses (the total number of protons and electrons in an atom). The most stable isotope of this element is einsteinium-252 with a half-life of 471.7 days.
This isotope decays into berkelium-248 or californium-252 in alpha decay and beta decay, respectively.
Until recently, researchers have had difficulty studying the properties of this element due to its relatively short half-life. However, researchers have recently managed to synthesise this element and study it using X-ray absorption and luminescence spectroscopy.
One of the interesting things about this element is that its atomic structure makes it difficult to understand how its electrons move around its nucleus. This is because the element’s large positive charge forces its electrons to travel faster than other lighter elements like helium and oxygen.