Electrochemical Equivalent: 0.7477g/amp-hr.Valence Electrons: 4s 2 Electron Dot Model.Number of Neutrons (most common/stable nuclide): 20.Number of Electrons (with no charge): 20.Electrons per Energy Level: 2,8,8,2 Shell Model.Electron Configuration: 1s 2 2s 2p 6 3s 2p 6 4s 2.Crystal Structure: Cubic face centered.Cross Section (Thermal Neutron Capture)σ a/ barns : 0.43.
Swedish: Kalcium Atomic Structure of Calcium. Series: Alkali Earth Metals Calcium's Name in Other Languages. Common Chemical Compounds of Calcium Overview of Calcium. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies. Common chemical compounds are also provided for many elements. Skip to site menu on this page Periodic Table of Elements Element Calcium - CaĬomprehensive data on the chemical element Calcium is provided on this page including scores of properties, element names in many languages, most known nuclides of Calcium. This will take you to the main part of Chemguide. To return to the list of all the CIE sections To return to the list of learning outcomes in Section 9.5 That means that you can fit a lot more iron atoms into a given volume than calcium atoms. The radius of a calcium atom is 0.197 nm the radius of an iron atom is only 0.126 nm. Iron atoms are significantly smaller than calcium atoms. The relative atomic mass of calcium is 40, but the RAM of iron is 56, for example. Iron is fairly typical with a density of 7.89 g cm -3.Īs you go across the period, the atoms get heavier. The transition elements have higher densities than calcium. Zinc's 3d electrons aren't involved because the 3d level is then full.Ĭalcium's density is quite low at 1.54 g cm -3. With scandium and the transition metals, 3d electrons are involved as well. In calcium, only the 4s electrons are involved. This is because one of the factors which control melting point is the number of electrons which are involved in the metallic bond. All of the transition metals following it in the Periodic Table have higher melting points (apart from zinc, which doesn't count as a transition metal). (In fact the modern IUPAC definition of a transition element would include scandium, but that isn't what the CIE syllabus is using.)Ĭalcium's melting point is variously quoted as 839☌ or 842☌. Remember that the d-block elements include everything from scandium to zinc, but scandium and zinc themselves don't count as transition elements. The syllabus actually compares calcium with the transition metals, but there are several cases where it is easier to compare it with the whole of the first row of d-block elements - especially for explanations. CA ELEMENT CHEMISTRY SERIES
The syllabus quotes calcium for comparison purposes because it is immediately before the first transition series in the Periodic Table. This statement asks you to compare the melting point and density of a typical transition metal with a non-transition metal like calcium.īefore you go on, you should find and read the statement in your copy of the syllabus.
Chemguide: CIE A level chemistry support: Learning outcome 9.5(c)Ĭhemguide: Support for CIE A level Chemistry
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