Classifying Reactions: A good summary
... chemical substance undergoes both oxidation and reduction. NO2 and H2O2 are classic chemicals that have this ability. Example: 3NO2(g) + H2O ...
... chemical substance undergoes both oxidation and reduction. NO2 and H2O2 are classic chemicals that have this ability. Example: 3NO2(g) + H2O ...
Conservation of Energy in chemical reactions, Hess`s Law
... happening under standard conditions.) ...
... happening under standard conditions.) ...
Chapter 4 Elements and the Periodic Table
... An atom is composed of positively charged protons, neutral neutrons, and negatively charged electrons. Protons and neutrons are about equal in mass. An electron has about 1/2,000 the mass of a proton or neutron. ...
... An atom is composed of positively charged protons, neutral neutrons, and negatively charged electrons. Protons and neutrons are about equal in mass. An electron has about 1/2,000 the mass of a proton or neutron. ...
Chapter 4 Elements and the Periodic Table
... An atom is composed of positively charged protons, neutral neutrons, and negatively charged electrons. Protons and neutrons are about equal in mass. An electron has about 1/2,000 the mass of a proton or neutron. ...
... An atom is composed of positively charged protons, neutral neutrons, and negatively charged electrons. Protons and neutrons are about equal in mass. An electron has about 1/2,000 the mass of a proton or neutron. ...
H2 Chemistry Syllabus (9729)
... Chemistry is about the study of matter, its interactions and transformations. At a macroscopic level, we observe matter and its interactions everywhere in our daily life. The submicroscopic level looks at the structure of matter that gives rise to these interactions. At O Level, students have been i ...
... Chemistry is about the study of matter, its interactions and transformations. At a macroscopic level, we observe matter and its interactions everywhere in our daily life. The submicroscopic level looks at the structure of matter that gives rise to these interactions. At O Level, students have been i ...
The collision theory of reactions
... In fact, Cl atoms react 1500 faster with ozone, compared to O atoms. Even though Cl atoms have a much lower concentration in the stratosphere than O atoms, the fact that they can be regenerated in a catalytic cycle can have devastating effects. Bromine is 100 times more effective at destroying ozone ...
... In fact, Cl atoms react 1500 faster with ozone, compared to O atoms. Even though Cl atoms have a much lower concentration in the stratosphere than O atoms, the fact that they can be regenerated in a catalytic cycle can have devastating effects. Bromine is 100 times more effective at destroying ozone ...
Dalton`s Atomic Theory
... many of these atoms must be lined up in a row to produce a line 1 m long? •1 1010 (10,000,000,000) atoms of radius 1 10-10 m would need to be lined up in a row to produce a line 1 m long. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. ...
... many of these atoms must be lined up in a row to produce a line 1 m long? •1 1010 (10,000,000,000) atoms of radius 1 10-10 m would need to be lined up in a row to produce a line 1 m long. Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. ...
Chapter 1: Matter and Change
... more elements that are chemically bonded. Many compounds consist of molecules. Water is an example of a compound. It is made of two elements, hydrogen and oxygen. The atoms of hydrogen and oxygen are chemically bonded to form a water molecule. You will learn more about the particles that make up com ...
... more elements that are chemically bonded. Many compounds consist of molecules. Water is an example of a compound. It is made of two elements, hydrogen and oxygen. The atoms of hydrogen and oxygen are chemically bonded to form a water molecule. You will learn more about the particles that make up com ...
Developing the Atomic Theory
... contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound • Law of multiple proportions: if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with ...
... contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound • Law of multiple proportions: if two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with ...
Document
... The charge the atom would have in a molecule (or an ionic compound) if electrons were completely transferred. 1. Free elements (uncombined state) have an oxidation number of zero. ...
... The charge the atom would have in a molecule (or an ionic compound) if electrons were completely transferred. 1. Free elements (uncombined state) have an oxidation number of zero. ...
Chapter 12: Solids and Modern Materials
... macroscale solids, the electrons occupy delocalize bands. ii. At what point does a molecule get so large that it starts behaving as through it has delocalized bands rather than localized molecular orbitals? The exact number depends on the specific semiconductor material. iii. One of the most spectac ...
... macroscale solids, the electrons occupy delocalize bands. ii. At what point does a molecule get so large that it starts behaving as through it has delocalized bands rather than localized molecular orbitals? The exact number depends on the specific semiconductor material. iii. One of the most spectac ...
Answers PRACTICE EXAM II Spring 2008 Part I. Multiple Choice (3
... You must show all work for credit or partial credit! M = 12.0 kDa (12,000 g/mol) 2. (10 points) At high temperatures, like those found in internal combustion automobile engines, N2 reacts with O2 to produce NO (g), a primary air pollutant. Consider this reaction, at 2300 K where, N2 (g) + O2 (g) ' 2 ...
... You must show all work for credit or partial credit! M = 12.0 kDa (12,000 g/mol) 2. (10 points) At high temperatures, like those found in internal combustion automobile engines, N2 reacts with O2 to produce NO (g), a primary air pollutant. Consider this reaction, at 2300 K where, N2 (g) + O2 (g) ' 2 ...
Ch 4 power point short version.pptx
... the different types of sublevels within the main energy level; each different type of sublevel has a different shape. • The magnetic quantum number (m), indicates the number of orbitals for each type of sublevel and how each one is oriented around the nucleus. • The spin quantum number has only tw ...
... the different types of sublevels within the main energy level; each different type of sublevel has a different shape. • The magnetic quantum number (m), indicates the number of orbitals for each type of sublevel and how each one is oriented around the nucleus. • The spin quantum number has only tw ...
Group 17: The Halogens - Chemwiki
... 1. Fluorine - Fluorine has an atomic number of 9 and is denoted by the symbol F. Elemental fluorine was first discovered in 1886 by isolating it from hydrofluoric acid. Fluorine exists as a diatomic molecule in its free state (F2) and is the most abundant halogen found in the Earth's crust. Fluorine ...
... 1. Fluorine - Fluorine has an atomic number of 9 and is denoted by the symbol F. Elemental fluorine was first discovered in 1886 by isolating it from hydrofluoric acid. Fluorine exists as a diatomic molecule in its free state (F2) and is the most abundant halogen found in the Earth's crust. Fluorine ...
Structure of the Atom
... experiment is carried out using a foil of a metal other than gold? Answer: If the α-scattering experiment is carried out using a foil of a metal rather than gold, there would be no change in the observation. In the α-scattering experiment, a gold foil was taken because gold is malleable and a thin f ...
... experiment is carried out using a foil of a metal other than gold? Answer: If the α-scattering experiment is carried out using a foil of a metal rather than gold, there would be no change in the observation. In the α-scattering experiment, a gold foil was taken because gold is malleable and a thin f ...
Atomic orbital An atomic orbital is a mathematical function that
... different elements, the higher nuclear charge, Z, of heavier elements causes their orbitals to contract by comparison to lighter ones, so that the overall size of the whole atom remains very roughly constant, even as the number of electrons in heavier elements (higher Z) increases. Also in general t ...
... different elements, the higher nuclear charge, Z, of heavier elements causes their orbitals to contract by comparison to lighter ones, so that the overall size of the whole atom remains very roughly constant, even as the number of electrons in heavier elements (higher Z) increases. Also in general t ...
Unit 12 Worksheet Answers
... 38. What is the nuclear charge of an iron atom? a. +26 b. +36 c. +56 d. +82 ...
... 38. What is the nuclear charge of an iron atom? a. +26 b. +36 c. +56 d. +82 ...
Chapter 6.2 Notes
... Metals form metallic bonds – bonds between metal cations and the sea of electrons around them - the nuclei form a closest packing structure - the electrons flow around them and do not belong to any one atom - there is a sea of freely moving electrons - this allows metals to flex into sheets or wires ...
... Metals form metallic bonds – bonds between metal cations and the sea of electrons around them - the nuclei form a closest packing structure - the electrons flow around them and do not belong to any one atom - there is a sea of freely moving electrons - this allows metals to flex into sheets or wires ...
Chapter 2
... The Atomic Theory of Matter Dalton’s Theory of Matter: 1. Each element is composed of extremely small particles call atoms. 2. All atoms of a given element are identical; atoms of different elements are different. 3. Atoms of an element are not changed into different types of atoms by a chemical re ...
... The Atomic Theory of Matter Dalton’s Theory of Matter: 1. Each element is composed of extremely small particles call atoms. 2. All atoms of a given element are identical; atoms of different elements are different. 3. Atoms of an element are not changed into different types of atoms by a chemical re ...
Atom Models - Learn District 196
... ‘Atom’ around 375 BC. The atom was defined as a small round indivisible particle. Democritus described the atom by talking about the constant division of an object until the object could no longer be divided. The idea of the Atom had to wait for 2200 years to be proven. ...
... ‘Atom’ around 375 BC. The atom was defined as a small round indivisible particle. Democritus described the atom by talking about the constant division of an object until the object could no longer be divided. The idea of the Atom had to wait for 2200 years to be proven. ...
Resumen Science I Trimestre II Parcial Definitions: Element: pure
... Exothermic change: energy is removed from the substance as it changes state. Give off heat. Condensation: the change of phase from gas to liquid , energy must be removed for condensation to occur. Removing energy slows the movement of gas particles which allows them to clump together. Condensation ...
... Exothermic change: energy is removed from the substance as it changes state. Give off heat. Condensation: the change of phase from gas to liquid , energy must be removed for condensation to occur. Removing energy slows the movement of gas particles which allows them to clump together. Condensation ...
CHEM 101 Final (Term 151)
... 20. A sample of a compound consisting of Cl and O, reacts with an excess H2 to give 0.233 g HCl and 0.403 g of H2O. Assume all Cl and O in the original sample are converted to HCl and H2O, respectively. Determine the empirical formula of the compound. A) Cl2O7 B) ClO3 C) Cl2O5 D) Cl3O7 E) Cl3O5 ...
... 20. A sample of a compound consisting of Cl and O, reacts with an excess H2 to give 0.233 g HCl and 0.403 g of H2O. Assume all Cl and O in the original sample are converted to HCl and H2O, respectively. Determine the empirical formula of the compound. A) Cl2O7 B) ClO3 C) Cl2O5 D) Cl3O7 E) Cl3O5 ...
Chemistry 11 - Sardis Secondary
... - calculating the amount of excess reactant - calculating the amount of product formed in a reaction using the limiting reactant C. Percent Yield (text pgs. 365-373) - calculating the efficiency of a chemical reaction from percent yield ...
... - calculating the amount of excess reactant - calculating the amount of product formed in a reaction using the limiting reactant C. Percent Yield (text pgs. 365-373) - calculating the efficiency of a chemical reaction from percent yield ...