Alkali Earth Metals – Group 2 Elements. Group 2 elements generally react to form compounds in which the group 2 element has an oxidation state of +2, beryllium will also do this but it has a tendency to form covalent rather than ionic compounds. - The Group 1A elements are called alkali metals. Introduction. Groups 1-2 termed s-block elements. Seven valence electrons, so elements from this group typically exhibit a -1 oxidation state; Noble Gases . Finally, IUPAC assigns collective names (lanthanoids and actinoids) and group numbering (1 to 18) and has investigated the membership of the group 3 elements. Unlike other groups, noble gasses are unreactive and have very low electronegativity or electron affinity. The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are the electrons involved in chemical bonds with other elements. x Remember that the reactivity increases as you move down Group 2 (see ionisation energies) Physical properties: x All light metals. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements. For a metal, alkali earth metals tend to have low melting points and low densities. elements in the same group are similar to each other; A section of the periodic table showing metals and non-metals. The noble gasses have complete valence electron shells, so they act differently. Groups 3-12 are termed d-block elements. Groups 3-11 are termed transition elements. They are transition metals because they have electrons in their d sublevels. Usually, there is no need to store these elements in oil, unlike the group one elements. (3) Both group 1 and group 2 elements produce white ionic compounds. The group number is an identifier used to describe the column of the standard periodic table in which the element appears. • Define allotropes and provide examples. Group 2 contains soft, silver metals that are less metallic in character than the Group 1 elements. Although many characteristics are common throughout the group, the heavier metals such as Ca, Sr, Ba, and Ra are almost as reactive as the Group 1 Alkali Metals.All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2. The group 16 elements of modern periodic table consist of 5 elements oxygen, sulphur, selenium, tellurium and polonium. Every element in the first column (group one) has one electron in its outer shell. Compare this with the coloured compounds of most transition metals. - The nonmetals of Group 7A are called halogens. The group 2 elements are called the alkaline earth metals. The transition metals are in groups 3 - 12. Elements in Group 2 are called alkaline earth metals which is most similar about the alkaline earth metals. The elements in this group are also known as the chalcogens or the ore-forming elements because many elements can be extracted from the sulphide or oxide ores. Group 2 Group 2 elements: Redox eactions: The Group 2 elements: x These are also called the alkaline earth metals as their hydroxides are alkaline. Those outer electrons are also called valence electrons. • Explain the importance to organisms of selected p-block elements. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium … 186 Chapter 7 The Elements Section 7.2 Properties of p-Block Elements Objectives • Describe and compare properties of p-block elements. The elements in each group have the same number of electrons in the outer orbital. Included in the group two elements are Beryllium(Be), Magnesium(Mg), Calcium(Ca), Strontium(Sr), and Barium(Ba). x Compounds are white or colourless. 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