Any of the metallic elements within Groups 3 to 12 in the Periodic Table that have an incomplete inner electron shell and that serve as transitional links between the most and the least electropositive in a series of elements.
They are characterized by multiple valences, colored compounds, and the ability to form stable complex ions. Also called transition metal. An element whose atom has an incomplete d sub-shell, or which can give rise to cations with an incomplete d sub-shell.
| Name | Symbol | Atomic Number | Atomic Weigth |
|---|---|---|---|
| Scandium | Sc | 21 | 44.95591 |
| Titanium | Ti | 22 | 47.88 |
| Vanadium | V | 23 | 50.9415 |
| Chromium | Cr | 24 | 51.9961 |
| Manganese | Mn | 25 | 54.93805 |
| Iron | Fe | 26 | 55.847 |
| Cobalt | Co | 27 | 58.9332 |
| Nickel | Ni | 28 | 58.6934 |
| Copper | Cu | 29 | 63.546 |
| Yttrium | Y | 39 | 88.90585 |
| Zirconium | Zr | 40 | 91.224 |
| Niobium | Nb | 41 | 92.90638 |
| Molybdenum | Mo | 42 | 95.94 |
| Technetium | Tc | 43 | -97.9072 |
| Ruthenium | Ru | 44 | 101.07 |
| Rhodium | Rh | 45 | 102.9055 |
| Palladium | Pd | 46 | 106.42 |
| Silver | Ag | 47 | 107.8682 |
| Lanthanum | La | 57 | 138.9055 |
| Hafnium | Hf | 72 | 178.49 |
| Tantalum | Ta | 73 | 180.9479 |
| Tungsten | W | 74 | 183.84 |
| Rhenium | Re | 75 | 186.207 |
| Osmium | Os | 76 | 190.23 |
| Iridium | Ir | 77 | 192.22 |
| Platinum | Pt | 78 | 195.08 |
| Gold | Au | 79 | 196.96654 |
| Actinium | Ac | 89 | -227.0278 |
| Rutherfordium | Rf | 104 | -261.1089 |
| Hahnium | Ha | 105 | -262.1144 |
| Seaborgium | Sg | 106 | -263.1186 |
| Nielsbohrium | Ns | 107 | -262.1231 |
| Hessium | Hs | 108 | -265.1306 |
| Mietnerium | Mt | 109 | -266.1378 |
| Unnunnilium | Unn | 110 | -268 |
| Unnununium | Unu | 111 | -269 |
Tantalum is a chemical element with the atomic number 73 in the periodic table. Its occurrence in Earth’s crust amounts to around 2 ppm. Being a member of the transition metals family of elements, this heavy metal has five valence electrons. It’s often used for its strong anti-corrosive and high thermal resistance properties in medicine, … Read more
Niobium is a chemical element with atomic number 41 in the periodic table. It’s the most plentiful metal found in Earth’s crust. Being a member of the transition metals family of periodic table elements, this superconductor can have 2, 3, or 5 electrons in the outermost valence shell that play a part in the chemical … Read more
Vanadium is a chemical element with the atomic number 23 in the periodic table. It’s the 21st most plentiful metal found in the upper part of Earth’s crust in a concentration of 100 mg V kg−1. Being a member of a broader transition metals group of elements, vanadium has five valence electrons and adopts +3, +4, and … Read more
Rutherfordium is a synthetic radioactive chemical element with the atomic number 104 in the periodic table. It cannot be found in Earth’s crust since it was produced in a scientific laboratory. According to the chemical calculations, rutherfordium would be a member of the titanium family of the periodic table. The elements in this group are … Read more
Hafnium is a chemical element with an atomic number of 72 in the periodic table of elements. It makes up about 3.3 parts per million (ppm) of Earth’s crust. However, it does not exist in its free metallic form in nature. This tetravalent transition metal is characterized as the most refractory of all nitrides of … Read more
Zirconium is a chemical element with the atomic number 40 in the periodic table. With 65 parts per million by weight, it’s a relatively abundant metal found in Earth’s crust. Being a member of the transition metals family of periodic table elements, this strong transition metal has four valence electrons in its outer shell. Known … Read more
Titanium is a chemical element with the atomic number 22 in the periodic table. After aluminum, iron, and magnesium, titanium is the fourth most abundant metal that occurs in Earth’s structural layers. As a member of the transition metals family of periodic table elements, titanium has four valence electrons. Being classified as a non-toxic and … Read more
Yttrium is a chemical element with atomic number 39 in the periodic table. This element is the most plentiful rare-earth metal found in the igneous rocks of Earth’s crust after cerium. Being a member of the transition group in the periodic table, this heavy metal has three valence electrons and forms only a few compounds. … Read more
Scandium is a chemical element with the atomic number 21 in the periodic table. With 22 parts-per-million abundance by weight, it’s the 31st most abundant element in Earth’s crust. Being a member of the transition metals family of periodic table elements, this rare-earth chemical element has three valence electrons and can be found in plenty … Read more