Finally, IUPAC assigns collective names (lanthanoids and actinoids) and group numbering (1 to 18) and has investigated the membership of the group 3 elements. Atomic Size: From top to bottom in a group, the size of atom increases as a new shell to the atom. It includes Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs) and francium (Fr). The properties of an element have periodic dependence on its atomic number but not on atomic weight. Carefully inspect this data to find trends, or patterns, in the properties of group 1 elements. Lithium, Sodium, Potassium, Rubidium, Caesium and Francium. Table of Data for Group 1 Elements. A great summary about Group 1 in the Periodic table - The Alkali Metals. The elements in group 1 are called the alkali metals. ... so elements from this group typically exhibit a -1 oxidation state; Noble Gases . They include lithium, sodium and potassium, which all react vigorously with air and water. Physical properties of the alkali metals Group 1 contains elements placed in a vertical column on the far left of the periodic table. The alkali metals provide the best example of group trends in properties in the periodic table, with elements … Valence Electrons(V.E) : Number of valence electrons in a group are same The general electronic configuration of elements of group 1 is ns 1.They have a strong tendency to donate their valence electron in the last shell to … Group 1 Elements: Alkali Metals. Physical Properties Alkali Metals: Electronic Configuration: [noble gas] ns 1, where n represents the valence shell. The table below gives the name, atomic number, electronic configuration of the atom, the first and second ionisation energy, melting point, density and electronegativity, of the Group 1 elements (alkali metals). The reactivity of the alkali metals increases down the group. This group lies in the s block of the periodic table. Characteristics of Group: The elements of a group show similar chemical properties but there is a gradual variation in the physical properties of the elements in a group. Included in Group 1 of the periodic table, the following are the alkali metals: Lithium; Sodium; Potassium; Rubidium; Caesium; Alkali Metals Properties. 1.3.1 Compared to Group 1 Elements samabrhms11 2020-02-05T06:50:38+00:00 Difference in Properties between the Transition Metals & Group I Elements The transition elements are located between Groups II and III in the centre of the Periodic Table. These are similar to Group 17 (Halogens) in a way that, it attains noble gas configuration after losing its valence electron. Group 1: Alkali metals. Flame tests are … Alkali Metals . They are known as s Block Elements as their last electron lies in the s-orbital. Essential Element … The Difference Between an Element Group and Period. 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