Periodic Table Research Paper

2066 Words 9 Pages
The periodic table had been a key factor in many ways to finding new elements, like scandium, silicon, and neon. It has shown new ways those elements could help us by predicting certain elements reactions. While Dimitri Ivanovich Mendeleev is considered to be the creator of the periodic table, there were many contributions that helped the creation of the useful graph be achieved. Between 1817 and 1829 Johann Dobereiner was grouping elements with similar properties into groups of threes, which he referred to as triads. He notices something between three elements. Strontium was an average of the weights of calcium and barium, which all had similar chemical properties. Working off the notion that in nature, triads always had the middle …show more content…
Metals are shiny, conduct heat and electricity the best out of the three, and are malleable and ductile. Metalloids have properties of both metals and non-metals. Non-metals are one the right side of the table. The metalloids are between the non-metals and metals, the metals making up the majority of the table. Periods are horizontal rows that help to arrange the elements. Each element in a period has the same number of atomic orbitals or shells. The periods are numbered one to seven. The first period has two elements, the second and third have five, the fourth and fifth have eighteen, the sixth has thirty-two (or should but many of them are underneath the rest of the elements so as not to make the table too wide), and the seventh has nineteen (similar to the sixth period, many of them are below the rest ). There are then groups, which are vertical columns. They are organized by either Roman numerals but are now more commonly organized by numbers from one to eighteen which is referred to as the IUPAC system. The different elements falling under one similar group name are: Alkali metals (Group 1), Alkaline earth metals (Group 2), Rare earth metals (Group 3), Transition metals (Groups 4-7), other metals and metalloids (Groups 13-16), Halogens (Group 17), Noble gasses (Group 18). Lanthanides and actinides are not numbered in either system. Each atom is made up of electrons, neutrons, and protons. …show more content…
With Mendeleev 's observation, Lars Frederik Nelson discovered the element called Scandium, by extracting it from euxenite, a complex metal containing 8 metal oxides. The name is derived from the Latin name for Scandinavia, and can be found on the periodic table in period four, group three (or IIIB) under the atomic number four. It is a transition, rare earth metal. It is silver metal, but it tarnishes in the air, which creates a pink or yellow tint, and it reacts with water but has a low toxicity. It 's atomic mass 44.96, with a density of 2.99 gcm-3. It is a solid at room temperature, and has a high melting point; 1541°C, or 1814 K, and boiling point; 2836°C, or 3109 K. Its density is similar to aluminum, but it has a much higher melting point. These properties make it ideal for things like bicycles frames and baseballs bats. It has been used in Russian MIG fighter planes as well, mixed with aluminum to make an alloy. It commonly used in research as well. Being a rare earth metal, the metal can be very expensive, the cost for pure 100 grams of it being about 1400 dollars. The name "rare earth metal" is misleading, however, as the metal isn 't especially rare. It can be found all over, but in very small quantities, and generally occur along with other metals and minerals. The process to separate the metal is very strenuous and expensive. It can be found in Thortveitite,

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