![]() ![]() The number of shells increases with the increase in atomic number. We will discuss some trends of fundamental properties of elements here. Periodic trends are based on the periodic law, which states that if the Chemical elements are listed in order of increasing atomic number(from left to right), then the physical and Chemical properties of elements will be a periodic function of their atomic numbers. They arise from the changes in the atomic structure of elements with their respective periods(horizontal rows) and groups(vertical columns) in the periodic table. Periodic trends depend upon the electronic configuration of elements. Periodic table trends are systematic patterns in the properties of elements of the periodic table. Periodic Trends in the Modern Periodic Table ![]() These elements possess the properties of both metals and non-metals. Metalloids - Metalloids are placed diagonally starting from boron (Group 13) to polonium (Group 16). Non-Metals - The space on the right-hand side of the modern periodic table is occupied by the non-metals. Group 1 elements are called alkali metals and Group 2 elements are called alkali earth metals. Metals - Metals are placed on the left-hand side of the modern periodic table. The second row is known as the actinide series (elements from atomic number 90 to 103). The first row is called the lanthanide series (elements from atomic number 58 to 71). Inner Transition Elements - There are two rows of inner transition elements and each row comprises 14 elements. The two outermost shells of these elements are not completely filled. They are present in the middle block of the periodic table. Transition Elements - The elements belonging to Groups 3 to 12 are known as transition elements. These are not reactive as the outermost shell of these elements is completely filled. ![]() Noble Gases - The elements of the Group 18 are called noble gases. These are also called representative elements. These elements are listed below:Įlements of Main Group - In the modern periodic table, the Group 1 and 2 elements on the left-hand side and the elements of the Group 13 to 17 on the right-hand side are known as the main group elements. There are different types of elements present in the modern periodic table. The horizontal rows are the periods and these are 7 in number. Groups are vertical columns and these are 18 in number. In simple words, the properties of the elements repeat themselves after regular intervals if the elements are arranged in the increasing order of their atomic number.Īll the elements are arranged in groups and periods in the periodic table. According to this law, the atomic number decides the properties of the elements. The modern periodic table was formed after the introduction of the modern periodic law. They are assigned positions in the groups and periods according to the atomic number and the similarities in the physical and Chemical properties. In the modern periodic table, all the elements are arranged systematically. ![]()
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