Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides.
Protons and Neutrons in Ytterbium
Ytterbium is a chemical element with atomic number 70 which means there are 70 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs.
The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. Neutron number plus atomic number equals atomic mass number: N+Z=A. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z.
For stable elements, there is usually a variety of stable isotopes. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. Mass numbers of typical isotopes of Ytterbium are 170-174, 176.
Main Isotopes of Ytterbium
Ytterbium occurs in 7 natural isotopes: 168Yb, 170Yb, 171Yb, 172Yb, 173Yb, 174Yb and 176Yb. 174Yb is the most common isotope, having a natural abundance of approximately 31%.
Ytterbium-168 is composed of 70 protons, 98 neutrons, and 70 electrons.
Ytterbium-170 is composed of 70 protons, 100 neutrons, and 70 electrons.
Ytterbium-171 is composed of 70 protons, 101 neutrons, and 70 electrons.
Ytterbium-172 is composed of 70 protons, 102 neutrons, and 70 electrons.
Ytterbium-173 is composed of 70 protons, 103 neutrons, and 70 electrons.
Ytterbium-174 is composed of 70 protons, 104 neutrons, and 70 electrons.
Ytterbium-176 is composed of 70 protons, 106 neutrons, and 70 electrons.
Electrons and Electron Configuration
The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. Therefore, the number of electrons in neutral atom of Ytterbium is 70. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other (Z – 1) negative electrons in the atom.
Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements. The configuration of these electrons follows from the principles of quantum mechanics. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. In the periodic table, the elements are listed in order of increasing atomic number Z.
Electron configuration of Ytterbium is [Xe] 4f14 6s2.
Possible oxidation states are +2,3.
|Number of protons||70|
|Number of neutrons (typical isotopes)||170-174, 176|
|Number of electrons||70|
|Electron configuration||[Xe] 4f14 6s2|
Properties of other elements