Alkaline Earth Metals(Group 2) Dr. S. S. Tripathy 10. stream In this unit, we study their properties, uses, important compounds and biological importance. BIOF possesses the shortest UV cutoff edge (230 nm), and SIOF has the largest birefringence (cal. Nevertheless, the related mechanism has never been fully explained. The alkaline earth metals are very reactive, although less so than the alkali metals. Group 2 Elements The Alkaline Earth Metals Revision Slides 2. endstream They burn with various colored flames as follows: beryllium (white), magnesium (bright white), calcium (red), strontium (crimson), barium (green), and radium (red). /FormType 1 Be(OH) 2 < Mg(OH) 2 5.2 Alkali metals: The word “alkali” is derived from the word al-qalīy meaning the plant ashes, referring to the original source of alkaline substances. Reactions of Group 2 Elements with Acids The name "alkaline earths" comes from an old name for the oxides of the elements. Alkaline earth metals are good reducing agents that tend to form the +2 oxidation state. {��@&�t���ԺQ��壘��=BV�%˧fW[93��|I(Ӛ��I.���6�� ����Js���@d��śJC�R�_�)��Q. Therefore these elements are called Alkaline earth metals. Alkaline earth metal This is a Wikipedia book , a collection of Wikipedia articles that can be easily saved, imported by an external electronic rendering service, and ordered as a printed book. /Length 15 �*�$�ȃ���)��X��������90F㰘R��me�_c&j3��ɘ5��Ue��)��>������ٝKLZ͝M]�� Academia.edu uses cookies to personalize content, tailor ads and improve the user experience. stream Of the alkaline earth metals calcium and magnesium rank fifth and sixth in abundance respectively in the earth’s crust. endstream However, all of these elements do occur naturally. They are not found in their pure state in nature due to their reactivity but are found readily in ores. theelectronconfiguration, whichisns2 foralkaline earth metals and ns1 for alkali metals. endobj Alkali & Alkaline Earth Metals Li, Na and K were discovered by electrolysis (1807-1818) Cs and Rbwere discovered spectroscopicallyin mineral spa waters Lithium is a very important metal • Li2CO3–flux in porcelain enamels, hardening agent for glass, therapeutic for manic-depressive psychoses • Li0–lightens and strengthens aircraft are effective in catalyzing the transesterification process efficiently. Alkali (or Group I) metals are more reactive than alkaline earth (or Group 2) metals. 24 0 obj As one goes down the group, the atoms have more shells of electrons making the atom bigger and there is a decrease in effective nuclear charge with successive elements because of Group 2: The Alkaline Earth Metals Atomic radius Atomic radius increases down Group 2. Ionic compounds of the alkaline earth metals with monovalent anions (e.g. /Matrix [1 0 0 1 0 0] The element is a high-melting, silver-white metal which is the first member of the alkaline earth metals. Also, the elements of Group 2 (alkaline earths) have much higher melting points and boiling points compared to those of Group 1 (alkali metals). �,H����� �^��H��{k�>�?���v��~��oΐ ����v���k;�~>���da��uv���t�7��hw�����.�k��s��fɶ�_o���cy����N_I�h�}�ȣ��[��Ci�,9��Y~�~�nr�G�y`�[��gL��]�m�n?��nw٧��u!�Y�/������R�4�9��w����w�b�j�^%~���^�������)�tQ��n�!������c��i������լ%��`���I�Z�p����#�b�f���9$n1e|l�[�7���Y�ä~��D By using our site, you agree to our collection of information through the use of cookies. • The elements in group 2 are sometimes called the alkaline earth metals, as their oxides and hydroxides are alkaline. >> Group 2: the alkaline earth metals Physical Properties Metals Halides, oxides, hydroxides, salts of oxoacids Complex ions in aqueous solution Complexes with … metal and the ligand, chiral alkaline earth metal complexes have been classified into three types (Figure 1.1) [1, 2, 5]. The solubility and basicy increases down the group. To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser. The halogens include chlorine, bromine and iodine. /Filter /FlateDecode /Resources 25 0 R A … Be(OH) 2 is almost insoluble, Mg(OH) 2 is sparingly soluble, Ca(OH) 2 is partially soluble and others are farely soluble. ALKALINE EARTH METALS 1. Alkaline Earth (Group II) Trends; Group 2: General Properties The elements in the group include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). /Length 933 Alkali and Alkaline Earth Metals presents the current scientific understanding of the physics, chemistry, geology, and biology of these two families of elements, including how they are synthesized in the uni-verse, when and how they were discovered, and where they are found alkali and alkaline earth metals respectively. >> >> /FormType 1 You can call this group as group 2 element. Some members of these families are left out because they are too unstable or too dangerous to use in our laboratory. 45 0 obj /Length 1789 The alkaline earth metals such as Li, K, Na, etc. endobj /Subtype /Form The alkaline earth metals are the elements that correspond to group 2 of the modern periodic table. Alkalinemeans basic. /Length 15 Alkaline Earth Metals Introduction * The metal oxides of these elements like lime , Strontia , Baryta etc., are thermally stable and exhibit basic character. << stream /Matrix [1 0 0 1 0 0] 26 0 obj 30 0 obj The alkaline earth metals are very reactive, although less so than the alkali metals. /BBox [0 0 5669.291 8] endstream The metals are all very reactive* when pure. Academia.edu is a platform for academics to share research papers. >> alkali and alkaline earth metals respectively. The alkaline-earth elements are highly metallic and are … /Matrix [1 0 0 1 0 0] Interesting Facts about Alkaline Earth Metals. x���P(�� �� Because of their high reactivity, the alkaline earths are not found free in nature. What are they? Oswaal Chapter 10 sblock elements (Alkali and Alkaline Earth Metals) Solutions Class 11 is a complete exam preparation tool. << /Type /XObject IA Metals: Alkali Metals INTRODUCTION: The alkali metals are a group in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs). The halogens include chlorine, bromine and iodine. The alkaline earth metals (beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: 1. shiny 2. silvery-white 3. somewhat reactive metals at standard temperature and pressure 4. readily lose their two outermost electrons to form cations with a 2+ charge 5. low densities 6. low melting points 7. low boiling poi…

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