2 types of metals. Distributed in rock structure. Oxides of all other alkaline earth metals are basic in nature. Alkaline-earth metals: The alkaline-earth metals make up Group 2 of the periodic table, from beryllium (Be) through radium (Ra). All the alkaline earth metals have two electrons in their valence shell, so they lose two electrons to form cations with a 2+ charge. This group lies in the s-block of the periodic table. How reactive are alkali metals? Be does not possess coordination number more than four. Alkaline Earth Metals. Group 2. Some characteristics of alkaline earth metals are: An oxidation number of +2 which makes them very reactive. Group 1: Group 2: Groups 17: Alkali Metals Halogens Alkaline Earth Metals Groups 18: Noble Gases Transition Metals Groups 3-12: CHEMICAL FAMILIES ON THE PERIODIC TABLE Is a group (column) that contains elements with similar _____. Together with hydrogen they constitute group 1, which lies in the s-block of the periodic table.All alkali metals have their outermost electron in an s-orbital: this shared electron configuration results in their having very similar characteristic properties. Each alkaline earth metal atom has two valence electrons in its outermost shell (s-orbital). This group of elements includes beryllium, magnesium, calcium, strontium, barium, and radium.The elements of this group are quite similar in their physical and chemical properties. all elements in group 1 except hydrogen. alkali metals. This gives alkaline earth metals the largest atomic radii in their periods. The halogens are in group 7 so they have seven valence electrons . The alkaline earth metals are the elements that correspond to group 2 of the modern periodic table. These metals are somewhat reactive at standard conditions. The alkaline earth metals are in the second group of the periodic table. Beryllium sulphate is readily soluble in water. All alkaline earth metals are placed under group number 2 and s-block of periodic table. The elements in Group 2 are called the alkaline earth metals. The elements in Group 2 are called the alkaline earth metals. 6. First ionisation energy decreases down the group Mg–Ba Explanation: the distance between the nucleus and the outermost valence electrons is increased… Not found freely in nature. Alkaline earth metals appear shiny, silvery-white and are found in the earth's crust. alkaline earth metals. very reactive. 5. 7. which elements is special about it's valence electron number in groups 13-18. helium. TWO. Atomic radius increases down the group Mg–Ba Explanation: the number of shells of electrons increases in each element as the group is descended. They are ready to give up those two electrons in electrovalent (ionic) bonds. ... is ten less than their group number. The alkali metals consist of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). The group number is the same as the number of valence electrons except in the transition metals . Reactions of Alkaline Earth Metals. alkali metals and alkaline earth metals. Present in the earth's crust but not in their basic form. All the discovered alkaline earth metals occur in nature. This element has an atomic number lower than that of aluminum and one less valence electron than the group 16 elements _____ This element is in group 1 and has a high atomic number than chlorine, but a lower atomic number than bromine. Atomic Number: 4 Atomic Mass: 9.0 Number of Protons/Electrons: 4 Number of Neutrons: 5 Classification: Alkaline Earth Metals Discovery: 1798 Discoverer: Fredrich … Other alkaline earth metals exhibit coordination number up to six. The alkaline earth metals comprise the group 2 elements. 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