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Minimum Learning Competencies - Ministry of Education, Ethiopia
... emission spectra of atoms consist of series of lines; State Bohr’s assumption of energy of electron in hydrogen atom ; Calculate the radius of electron orbit, the electron velocity & the energy of an electron using Bohr model; Explain that atoms emit or absorb energy when they undergo transition fro ...
... emission spectra of atoms consist of series of lines; State Bohr’s assumption of energy of electron in hydrogen atom ; Calculate the radius of electron orbit, the electron velocity & the energy of an electron using Bohr model; Explain that atoms emit or absorb energy when they undergo transition fro ...
Chemistry
... bonding. The Valence Shell Electron Pair Repulsion (VSEPR) model is used to visualise the threedimensional structure of molecules, which determines the type of interactions possible and also helps to explain the physical and chemical properties. Knowledge of structure and bonding is also important t ...
... bonding. The Valence Shell Electron Pair Repulsion (VSEPR) model is used to visualise the threedimensional structure of molecules, which determines the type of interactions possible and also helps to explain the physical and chemical properties. Knowledge of structure and bonding is also important t ...
Chem12 SM Unit 5 Review final ok
... 25. False. Substances in their elemental form have oxidation numbers of 0. 26. False. The sum of the oxidation numbers in a polyatomic ion must equal the overall charge of the ion. 27. True 28. False. In the synthesis reaction that produces sulfur dioxide from elemental sulfur and oxygen gas, sulfur ...
... 25. False. Substances in their elemental form have oxidation numbers of 0. 26. False. The sum of the oxidation numbers in a polyatomic ion must equal the overall charge of the ion. 27. True 28. False. In the synthesis reaction that produces sulfur dioxide from elemental sulfur and oxygen gas, sulfur ...
Brilliant Preparatory Section, Sitamarhi
... This skeleton equation itself is a balanced one. But in many cases the skeleton equation is not a balanced one. For example, the decomposition of Lead Nitrate giving Lead oxide, NO2 and oxygen. The skeletal equation for this reaction is Pb(NO3)2 → PbO + NO2 + O2 iv. In the skeleton equation, the num ...
... This skeleton equation itself is a balanced one. But in many cases the skeleton equation is not a balanced one. For example, the decomposition of Lead Nitrate giving Lead oxide, NO2 and oxygen. The skeletal equation for this reaction is Pb(NO3)2 → PbO + NO2 + O2 iv. In the skeleton equation, the num ...
Department of Chemistry School of Natural Sciences
... most important ideas in chemistry. Equilibrium, especially acid/base applications, explores the extent of reactions while thermodynamics helps us understand if a reaction will happen. The aim of the laboratory will be to develop your experimental skills, especially your ability to perform meaningful ...
... most important ideas in chemistry. Equilibrium, especially acid/base applications, explores the extent of reactions while thermodynamics helps us understand if a reaction will happen. The aim of the laboratory will be to develop your experimental skills, especially your ability to perform meaningful ...
1 MATTER: Anything which occupies space , has volume and can
... Coordination number is the number of nearest neighbours of any particle. CN for simple cubic (SCC) =6, BCC =8, FCC (hcp or ccp) = 12. Q1. A compound formed by elements A and B has a cubic structure in which A atoms are at the corners of the cube and B atoms are at the face centres. Derive the formul ...
... Coordination number is the number of nearest neighbours of any particle. CN for simple cubic (SCC) =6, BCC =8, FCC (hcp or ccp) = 12. Q1. A compound formed by elements A and B has a cubic structure in which A atoms are at the corners of the cube and B atoms are at the face centres. Derive the formul ...
Final Exam
... ____ 27. The osmotic pressure of blood is 7.65 atm at 37 C. What mass of glucose (C6H12O6, molar mass = 180.2 g/mol) is needed to prepare 5.00 L of solution for intravenous injection? The osmotic pressure of the glucose solution must equal the osmotic pressure of blood. (R = 0.08206 L·atm/mol·K) a. ...
... ____ 27. The osmotic pressure of blood is 7.65 atm at 37 C. What mass of glucose (C6H12O6, molar mass = 180.2 g/mol) is needed to prepare 5.00 L of solution for intravenous injection? The osmotic pressure of the glucose solution must equal the osmotic pressure of blood. (R = 0.08206 L·atm/mol·K) a. ...
Answers - Pearson
... compounds of Group 1 and 2 elements. These compounds were later broken down into their component elements by electrolysis. 3 The Schrödinger model: ...
... compounds of Group 1 and 2 elements. These compounds were later broken down into their component elements by electrolysis. 3 The Schrödinger model: ...
3: Haloalkanes, Alcohols, Ethers, and Amines
... electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences in Table 3.1 mean that C is positively polarized (δ+) while its attached atom is negatively polarized (δ-). The relative magnitudes of these electronegativity differences reflect ...
... electronegativities of H (2.3) and C (2.5) are about the same. Positive (+) values for the electronegativity differences in Table 3.1 mean that C is positively polarized (δ+) while its attached atom is negatively polarized (δ-). The relative magnitudes of these electronegativity differences reflect ...
oxford chemistry primers
... simpler to describe light of frequency v from a quantum standpoint: From this perspective, light is regarded as a stream of particles, called photons, each of which carries an energy hv, where h is Planck's constant (of which, more anon) and v is the frequency. This was Einstein's explanation for pe ...
... simpler to describe light of frequency v from a quantum standpoint: From this perspective, light is regarded as a stream of particles, called photons, each of which carries an energy hv, where h is Planck's constant (of which, more anon) and v is the frequency. This was Einstein's explanation for pe ...
Organic Compounds FT-IR Spectroscopy
... by replacing nvib= 0 in the relationship (3). In the relationship (3) h is the size Planck constant. (6,626075 x 10-34 Js). If diatomic molecule fundamental changes from the vibration (nvib = 0) in the state of vibration excited immediately above (nvib = 1), then change of energy ΔEvib(01) is expre ...
... by replacing nvib= 0 in the relationship (3). In the relationship (3) h is the size Planck constant. (6,626075 x 10-34 Js). If diatomic molecule fundamental changes from the vibration (nvib = 0) in the state of vibration excited immediately above (nvib = 1), then change of energy ΔEvib(01) is expre ...
Chemistry 101L
... appropriate, have room for classmates’ data. Now organize your list into things that are similar or data that should be compared. Tables columns/rows do not have to be listed in the same order that the measurements were made. For example, it is easier to subtract the initial volume from the final vo ...
... appropriate, have room for classmates’ data. Now organize your list into things that are similar or data that should be compared. Tables columns/rows do not have to be listed in the same order that the measurements were made. For example, it is easier to subtract the initial volume from the final vo ...
Chemistry
... For over 2000 years, people have wondered about the fundamental building blocks of matter. As far back as 440 BC, the Greek Leucippus and his pupil Democritus coined the term atomos to describe the smallest particle of matter. It translates to mean something that is indivisible. In the eighteenth ce ...
... For over 2000 years, people have wondered about the fundamental building blocks of matter. As far back as 440 BC, the Greek Leucippus and his pupil Democritus coined the term atomos to describe the smallest particle of matter. It translates to mean something that is indivisible. In the eighteenth ce ...
Electron configuration
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s2 2s2 2p6.Electronic configurations describe electrons as each moving independently in an orbital, in an average field created by all other orbitals. Mathematically, configurations are described by Slater determinants or configuration state functions.According to the laws of quantum mechanics, for systems with only one electron, an energy is associated with each electron configuration and, upon certain conditions, electrons are able to move from one configuration to another by the emission or absorption of a quantum of energy, in the form of a photon.Knowledge of the electron configuration of different atoms is useful in understanding the structure of the periodic table of elements. The concept is also useful for describing the chemical bonds that hold atoms together. In bulk materials, this same idea helps explain the peculiar properties of lasers and semiconductors.