The atomic radii of elements gradually increases as you move across (from right to left) in a period, and down (from top to bottom) in a group. Measure distance between the centers of the two adjacent atoms and half of the value is called atomic radius of the element. Atomic Radius TrendĬonsider two atoms of the same element that touch each other by their outer edges. Detailed information regarding trends in the modern periodic table is highlighted below. Refer to the arrangement of elements in the periodic table the horizontal row of element is called period and the same in vertical column is called group.
In fact, this tabular representation of elements is the base for chemistry subject. In chemistry, understanding the basic periodic table facts is like learning the A, B, C… of the English language. Also, go through the periodic table trends and you will come to know a regular pattern in the alteration of physical and chemical properties of elements, as you go from left to right, from top to down direction, and vice versa. For example, chemical elements falling in the same group share common properties, which are different from other groups. The modern periodic table has a lot to say about the chemical elements, besides the atomic number, atomic weight, and symbol of the identified elements. Finally, the modern, labeled periodic table of elements with names is developed for reference of chemical elements at a glance.
In the history of periodic table, lots of changes were being made with the discovery of elements and theoretical assumptions. Taking his name, it was named the Mendeleev periodic table, in which the chemical elements are positioned in order of their increasing mass number. The first periodic table was created by Dmitri Mendeleev, a Russian professor in 1869. Read this article to get an insight about the trends in the periodic table of elements. Learning periodic table trends will help you understand the changes of elemental properties in a specific manner, while moving in a particular direction.
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