03 11 12. noble gases and halogens

Jan 1, 2014Download as pptx, pdf2 likes532 views

Nining Ningsih

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Group 7 – the halogens lessonRob_Johnston

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The document compares the properties of the halogens (F, Cl, Br, I, At). It shows that fluorine has the lowest boiling point and is the most reactive, while iodine has the highest boiling point and is the least reactive. Fluorine forms a yellow gas, chlorine forms a green gas, bromine forms an orange liquid, and iodine forms a grey solid. Astatine is predicted to have a higher boiling point than iodine and be less reactive. Displacement reactions are discussed, where more reactive halogens can displace less reactive ones from their compounds.

Lesson 1 Group 7 Elements Eamscuffruff

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The document discusses the properties of halogens and their reactions. It describes the trends in boiling points, atomic radii, electron affinity, and color as atomic number increases across the halogens. Tests are outlined to identify chloride, bromide, and iodide ions using silver nitrate and ammonia, which form different precipitates and solubilities. The reactions of group 1 metals like sodium with halogens are discussed.

A T O M & E L E M E N Troszelan

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The document discusses the key concepts of elements, compounds, atoms, and molecules. It defines elements as pure substances that cannot be broken down further, and compounds as substances made of two or more elements bonded chemically. Atoms are the smallest particles of an element, with a nucleus containing protons and neutrons surrounded by electrons. Molecules are formed when two or more atoms of elements share electrons to achieve a stable electron configuration.

Group 17 halogenFari Yuri

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Iodine Presentationguest06f30d

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Iodine is a non-metallic, violet colored halogen element with an atomic number of 53. It was discovered in 1811 in France by Bernard Courtois and gets its name from the Greek word "Iodes." Iodine naturally occurs in brines, Chilean nitrate deposits, and is found in trace amounts in the universe, sun, meteorites, crustal rocks, sea water, fresh water, and humans. Its main uses are in medicine, disinfectants, photography, and salt.

Pt publishsulaimanmohd80

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1. The document discusses the periodic table and provides details about various groups of elements. It describes the physical and chemical properties of Group 1 alkali metals, Group 17 halogens, transition elements, and Group 18 noble gases. 2. Key physical trends mentioned are that properties like melting point, boiling point, and density increase down a group as atomic size increases. Chemical reactivity also increases down a group as electropositivity increases. 3. The periodic table arranges elements based on proton number and electron configuration, allowing prediction of trends in properties across periods and down groups.

Transition elementsShah Fiza

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StoryboardNining Ningsih

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Jurnal utama tentang mediaNining Ningsih

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This article discusses research on the design of effective animations for teaching molecular chemistry concepts. It explores how animations can help or hinder student understanding depending on their design. Well-designed animations that are grounded in principles of cognitive learning theory have been shown to improve students' conceptual understanding, but students may also misinterpret animations if not provided explanations. The article thus emphasizes the importance of integrating animations with active learning strategies like predictions, discussions, and connections to prior knowledge to maximize student learning.

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Jurnal utama tentang mediaNining Ningsih

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This article discusses research on the effective design of animations for teaching molecular chemistry concepts. It explores how animations can help or hinder student understanding depending on how they are designed and implemented. Key findings from research show that animations are most effective when they adhere to principles of cognitive load theory and multimedia learning, such as combining visuals with narration and limiting extraneous details. However, students may also misinterpret animations if not guided by explanations from instructors. The article thus emphasizes the importance of integrating animations with other active learning strategies like predictions, discussions, and real-world experiments.