Why does the Periodic Table have that separated part (lanthanides and actinides) at the bottom?
In short the periodical table looks the way it is so I can print out a copy to give to my students without it being to wide or too tall …— Teachers
Why is there a separate group of elements below all the elements? Why are elements with smaller numbers are found deeper down in the periodic table? To understand why Lanthanides and Actinides are located at the bottom of the periodical table we need to understand their properties and what group they belong to. Lanthanides and Actinides are known as Inner-Transition metals and they have different properties compared to other elements. Inner-Transition metals were only discovered recently and not much is known about them. It is very important to understand why they are located at the bottom because it plays a big role in the shape, size and history of periodic table and why they have been separated.
Inner transition metals were only discovered recently, the first to be discovered was Uranium by German chemist Martin Heinrich Klaproth in 1789 and the latest element (Lawrencium — 103) in 1961.Uranium the first inner-transition element to be discovered was used as a coating to decorate glass, but later in 1896 Henri Becquerel left some photographic plates in a drawer with a sample of uranium, and discovered that the…
