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