On this page you can discover the chemical properties of radium and information about radium and other elements of the periodic table such as barium, francium, actinium or hydrogen. You will also learn what radium is for and what its uses are through its properties associated with radium such as its atomic number or the usual state in which radium can be found. You Can Visit Our Managed: Periodic Table Main Page Its symbol is Ra and it belongs to the group of alkaline earth metals and its normal state in nature is solid. The radius is located at position 88 on the periodic table. Radium is a silvery-white metallic chemical element with atomic number 88. In short, the atomic radius increases or decreases based on the effective nuclear charge.We elaborate the uses of Radium and atomic properties with characteristics. Note: The trend will anyhow be present for the groups and periods in the periodic table, do not get confused due to the option (D). Thus, the correct trend can be shown by option (A) Li < Na < K < Rb < Cs. This shows us that lithium has the smallest atomic radius and caesium has the largest atomic radius within the given elements of a group. Each one have been described below for better understanding Įlectronic configuration- 2, 8, 18, 18, 8, 1 Here, we have five elements from Group 1 (IA, Alkali metals). The picture here shows the trend in accordance with the atomic radius in the modern periodic table. Thus, the electrons go farther away from the nucleus. In addition, there is an electron shielding effect which decreases the attraction between the positively charged nucleus and negatively charged electrons. This is because there are more energy levels and therefore a greater distance between protons and electrons of the same atom. Group- Down the group, atomic radius increases. Thus, the atomic radius decreases across the period. the nucleus attracts the electrons more strongly pulling the atom’s shell closer to the nucleus. This results in greater nuclear attraction i.e. However, an equal number of protons are added to the nucleus so that there is balance of the charges in an atom. This is because, within the period electrons are added in the same shell. Period- Atomic size gradually decreases from left to right across the period of elements. The atomic radii of elements vary in the periodic table in a fixed pattern. The atomic radius of an atom is measured by X-ray or other spectroscopy methods. Typically, it is stated as the total distance from an atom’s nucleus to the outermost orbital of an electron. Let us first understand what do we mean by atomic radius and further we will move towards the trends in the modern periodic table.Ītomic radius- Atomic radius of a chemical element is basically the size of its atom. Hint: In the periodic table, the elements of any group shows the continual behaviour within the group with respect to any property or trends applied to the same.
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