its actually Einsteinium.
The electron configuration [Rn]5f11.7s2 is for einsteinium (Es).
An electron is a subatomic particle that carries a negative electric charge. It is one of the fundamental constituents of matter, along with protons and neutrons. Electrons are found outside the atomic nucleus in electron shells or orbitals, and they play a crucial role in various physical phenomena, including electricity, magnetism, and chemical reactions. Electrons are elementary particles, meaning they are not composed of smaller constituents. Their behavior is described by the principles of quantum mechanics. Understanding the behavior of electrons is fundamental to our understanding of the structure of atoms and the properties of materials.
Francium; Fr
Einsteinium (Es)
einsteinium
Einsteinium
Fjffj
Einsteinium
Lanthanum has an atomic number of 57 and is the first element in the Lanthanoids. Its full orbital notation is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 5d1.
The radioactive element neptunium (atomic number 93) has the electron configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p64f14 5d10 6s2 6p6 7s2 6d1 5f4 The noble gas form is [Rn] 7s2 6d1 5f4
Lawrencium is a trivalent chemical element.
Einsteinium, Es, atom number 99, in the actinides and 'trans-uranides' group, 5f-blockElectron configuration: [Rn] 5f11 7s2Preceded by 98Ca, californium, with [Rn] 5f10 7s2
[Rn] 5f3 6d1 7s2
Mendelevium (Md)
Mendelevium is a block f, period 7 actinide element. Its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f14 5d10 6s2 6p6 5f13 7s2. Another way to write this is [Rn] 5f13 7s2 since the beginning of its configuration is the same as radon's.
The element whose electronic structure is [Rn]7s2 = Raradium
[Rn] 7s2 is the noble gas notation for radium. A link is provided to the Wikipedia article on radium.
Lanthanum has an atomic number of 57 and is the first element in the Lanthanoids. Its full orbital notation is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 5d1.
[Rn]7s2
[Rn] 5f6 7s2.
[Rn] 5f6 7s2
[Rn]5f14 7s2 7p1
[Rn] 5f9 7s2
[Rn] 7s2 5f1
The electron configuration of uranium is: [Rn]5f36d17s2.