The alkaline earth metals are six chemical elements in group 2 of the periodic table.They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Pnictogens – The elements of group 15: N, P, As, Sb, Bi. An exception is the "iron group", which usually refers to "group 8", but in chemistry may also mean iron, cobalt, and nickel, or some other set of elements with similar chemical properties. Group 1 elements are called "alkali metals". The group 1 elements are all soft, reactive metals with low melting points. Order generally grows with increasing atomic mass. Atomic Numbers; Elements from 1 to 50 ; Discovery of Elemens; Elements by Group; Elements by Density; Elements by Melting Point; Atomic Number Group 1 Elements in Periodic Table. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements. Members of a group typically have similar properties and electron configurations in their outer shell. Forum Member. List of elements of the periodic table by group and period including the chemical symbol and the atomic number. The new system simply numbers the groups increasingly from left to right on the standard periodic table. Hydrogen is not considered to be an alkali metal as it rarely exhibits behaviour comparable to theirs, though it is more analogous to them than any other group. Very often these categories are marked by a background color in the periodic table. The first three elements in Group 1 are Lithium, Sodium and Potassium and the three pictures below show the arrangement of electrons in their atoms. The first letter is always capitalized. Important Solutions 3106. Disagreements mostly involve elements number 1 and 2 (hydrogen and helium), as well as inner transition metals. See About the Periodic Table for information on how Group can be used to characterize an element. Rare-earth elements, pnictogens, chalcogens, and halogens are, This page was last edited on 1 October 2020, at 23:43. List of elements Atomic Number Name Symbol Group Period Number Block State at. In history, several sets of group names have been used:[2][3], Some other names have been proposed and used without gaining wide acceptance: "volatile metals" for group 12;[7] "icosagens" for group 13;[8] "crystallogens",[5] "adamantogens",[9] and "merylides"[citation needed] for group 14; and "aerogens" for group 18.[6]. They include lithium, sodium and potassium, which all react vigorously with water to produce an alkaline solution. All of these metals react vigorously or even explosively with cold water. Both systems agree on the numbers. The names of some elements indicate their element group. Each element's atomic number, name, element symbol, and group and period numbers on the periodic table are given. Group 1 will have only one unpaired electron with one electron in its valence shell making atom donate electron to get octet configuration so called metals and alkali in nature. Group 1 elements are very reactive. The following collective names are recommended by IUPAC: Alkali metals – The metals of group 1: Li, Na, K, Rb, Cs, Fr. It resembles calcium. The elements in group 13 and group 15 form a cation with a -3 charge each. What similarity do you observe in their electronic configurations? Elements in group 16 have a charge of -2, while all the elements of group 17 are halogens with a charge of -1 each. Group 1 contains elements placed in a vertical column on the far left of the periodic table. In each case, a solution of the metal hydroxide is produced together with hydrogen gas. 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