Specialized subcategories such as the refractory metals and the noble metals also exist. From left to right in the periodic table, these categories include the highly reactive alkali metals the less-reactive alkaline earth metals, lanthanides, and radioactive actinides the archetypal transition metals and the physically and chemically weak post-transition metals. Metals comprise the large majority of the elements, and can be subdivided into several different categories. Au, Pt), or have nonmetallic structures ( Mn and Ga are structurally analogous to, respectively, white P and I). Ti, Re), or are noble (hard to oxidise, e.g. W, Nb), are liquids at or near room temperature (e.g. Be, Al) or very high melting points (e.g. Some metals appear coloured ( Cu, Cs, Au), have low densities (e.g. Most metals are silvery looking, high density, relatively soft and easily deformed solids with good electrical and thermal conductivity, closely packed structures, low ionisation energies and electronegativities, and are found naturally in combined states. 2.Metals appear lustrous (beneath any patina) form mixtures ( alloys) when combined with other metals tend to lose or share electrons when they react with other substances and each forms at least one predominantly basic oxide.The trends in ionisation energies across periods and down groups can be explained in terms of the atomic size, nuclear charge and the screening effect due to inner shell electrons.C4.1b explain how observed simple properties of Groups 1, 7 and 0 depend on the outer shell of electrons of the atoms and predict properties from given trends down the groups.C4 Predicting and identifying reactions and products.C2.3.2 explain how observed simple properties of Groups 1, 7 and 0 depend on the outer shell of electrons of the atoms and predict properties from given trends down the groups.C2.3 How do metals and non-metals combine to form compounds?.6.13 Explain the relative reactivity of the halogens in terms of electronic configurations.6.5 Explain this pattern in reactivity in terms of electronic configurations.5.1 Atomic structure and the periodic table.Explain how the observed simple properties of Group 7 depend on the outer shell of electrons of the atoms and predict properties from given trends down the group.Explain how the observed simple properties of Group 1 depend on the outer shell of electrons of the atoms and predict properties from given trends down the group.Students should be able to: explain how properties of the elements in Group 1 depend on the outer shell of electrons of the atoms.Students should be able to: explain how properties of the elements in Group 7 depend on the outer shell of electrons of the atoms.4.1 Atomic structure and the periodic table. Explanations in terms of atomic radius, screening effect and nuclear charge for general trends in proprties of elements in groups I and VII.Explanations for general trends in values: (i) down a group Explanations for trends in values: (i) down a group The periodic table as a list of elements arranged so as to demonstrate trends in their physical and chemical properties.Unit C1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis.1.6.20 demonstrate knowledge and understanding of how the reactivity down the group depends on the outer shell electrons of the atoms.1.6.14 demonstrate knowledge and understanding of how the trend in reactivity down the group depends on the outer shell electrons of the atoms.Unit 1: Structures, Trends, Chemical Reactions, Quantitative Chemistry and Analysis.1.2.13 explain the trend in the first ionisation energies of atoms down Groups and across Periods in terms of nuclear charge, distance of outermost electron from the nucleus, shielding and stability of filled and half-filled subshells.Unit AS 1: Basic Concepts in Physical and Inorganic Chemistry.RSC Yusuf Hamied Inspirational Science Programme.Introductory maths for higher education.The physics of restoration and conservation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |