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