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Power pt on shapes and molecules1
Power pt on shapes and molecules1Andrew Matovu1) The shapes of molecules are determined by electron pair repulsion theory (VSEPR), which predicts molecular geometry based on the number of electron pairs around a central atom.
2) Electron pairs repel one another, seeking positions as far apart as possible to minimize repulsion. The greatest repulsions are between lone pairs, followed by lone pairs and bond pairs, with the weakest being between bond pairs.
3) Common molecular geometries predicted by VSEPR include tetrahedral for 4 electron pairs, trigonal planar for 3 pairs, and linear for 2 pairs. Deviations from the ideal angles can occur due to unequal repulsions between different types of electron pairs.
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Ionisationgroups[1]Andrew MatovuThe document discusses how the ionization energies of elements can indicate their position in the periodic table. It notes that potassium, as a group 1 element, has a jump in energy needed to remove its second electron. Similarly, it identifies jumps for elements in groups 2 through 5 that correspond to removing the third, fourth, fifth and sixth electrons respectively, demonstrating how ionization energies reflect the electron configuration of elements.
Ppt ionic formulae
Ppt ionic formulaeAndrew MatovuWhen metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms. This results in the metal atoms becoming positively charged ions with fewer electrons than protons and the non-metal atoms becoming negatively charged ions with more electrons than protons. Examples of common ionic charges are provided for elements in different groups of the periodic table. The document also explains how to write chemical formulas for ionic compounds by writing the symbols for the cation and anion.
Observaciones Ministerio Coordinador Seguridad Reformas COIP Enero 2016mariangel1982El documento presenta información sobre reformas al Código Orgánico Integral Penal relacionadas con delitos como narcotráfico, minería ilegal y grupos armados ilegales. Describe factores de riesgo para el estado como la violencia focalizada y la cadena logística de actividades delictivas. Incluye modus operandi y casos en provincias como Esmeraldas y Sucumbíos. Finalmente, hace recomendaciones sobre reformas al artículo 265 relacionado con tráfico de combustible en zonas fronterizas.
P pt ionic formulae
P pt ionic formulaeAndrew MatovuWhen metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms. This results in the metal atoms becoming positively charged ions with fewer electrons than protons and the non-metal atoms becoming negatively charged ions with more electrons than protons. Examples of common monatomic ions formed include Na+, Ca2+, Al3+, Cl-, O2-, and N3-. Polyatomic ions such as NO3- and SO42- also exist. Ionic compounds are formed by combining these ions following rules based on their charges.
Electron configurations (1)
Electron configurations (1)Andrew MatovuEnergy levels are given the levels 1,2, 3, 4 etc at AS/A2 level. The level 1 is the lowest energy level and closest to the nucleus.The Sub-levels are given the letters s, p, d, f and so on. The different sub-levels contain different numbers of electrons.
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