Triple Award - Cheltenham College
... Recall that atoms consist of a central nucleus, composed of protons and neutrons, surrounded by orbiting electrons. State the relative mass and relative charge on a proton, neutron and electron. ...
... Recall that atoms consist of a central nucleus, composed of protons and neutrons, surrounded by orbiting electrons. State the relative mass and relative charge on a proton, neutron and electron. ...
quantum mechanical model of the atom
... Bohr’s Model of the Atom • Bohr’s model explained the hydrogen’s spectral lines, but failed to explain any other element’s lines. • For this and other reasons, the Bohr model was replaced with a more sophisticated model called the quantum-mechanical or wavemechanical model. ...
... Bohr’s Model of the Atom • Bohr’s model explained the hydrogen’s spectral lines, but failed to explain any other element’s lines. • For this and other reasons, the Bohr model was replaced with a more sophisticated model called the quantum-mechanical or wavemechanical model. ...
Title - Iowa State University
... 3. Which of the following statements about catalysts is false? a. A catalyst will speed up the rate of a reaction. b. Catalysts are used in very many commercially important chemical reactions. c. Catalytic converters are examples of heterogeneous catalysts. d. A catalyst can cause a nonspontaneous r ...
... 3. Which of the following statements about catalysts is false? a. A catalyst will speed up the rate of a reaction. b. Catalysts are used in very many commercially important chemical reactions. c. Catalytic converters are examples of heterogeneous catalysts. d. A catalyst can cause a nonspontaneous r ...
Ernest Rutherford
... Ernest Rutherford Worked with Geiger and Marsden to prove that the nucleus is positive Hans Geiger Involved in a number of experiments that lead to Rutherford’s breakthrough theory of the atom Ernest Marsden Experiments to study the scattering of alpha particles by thin metal foils James Chadwick ...
... Ernest Rutherford Worked with Geiger and Marsden to prove that the nucleus is positive Hans Geiger Involved in a number of experiments that lead to Rutherford’s breakthrough theory of the atom Ernest Marsden Experiments to study the scattering of alpha particles by thin metal foils James Chadwick ...
3 Modern Atomic Theory
... In Bohr’s model, electrons orbited the nucleus like planets orbit a star. However, Bohr’s atomic model worked only for hydrogen. Other scientists realized that other elements were better described by combining Bohr’s ideas about energy levels with ideas about probability. Imagine a spinning propelle ...
... In Bohr’s model, electrons orbited the nucleus like planets orbit a star. However, Bohr’s atomic model worked only for hydrogen. Other scientists realized that other elements were better described by combining Bohr’s ideas about energy levels with ideas about probability. Imagine a spinning propelle ...
3 Modern Atomic Theory - Lower Cape May Regional School District
... In Bohr’s model, electrons orbited the nucleus like planets orbit a star. However, Bohr’s atomic model worked only for hydrogen. Other scientists realized that other elements were better described by combining Bohr’s ideas about energy levels with ideas about probability. Imagine a spinning propelle ...
... In Bohr’s model, electrons orbited the nucleus like planets orbit a star. However, Bohr’s atomic model worked only for hydrogen. Other scientists realized that other elements were better described by combining Bohr’s ideas about energy levels with ideas about probability. Imagine a spinning propelle ...
File
... inconsistent. It is most likely that the determined concentration of NaOH would be A) lower in the first run than in the other two B) higher in the first run than in the other two. C) the same in the first two runs, but lower in the third. D) the same in the first two runs, but higher in the third. ...
... inconsistent. It is most likely that the determined concentration of NaOH would be A) lower in the first run than in the other two B) higher in the first run than in the other two. C) the same in the first two runs, but lower in the third. D) the same in the first two runs, but higher in the third. ...
1994–PTAS, Inc - mvhs
... 1. If two atomic species are isotopes, then (A) both atoms must have identical nuclei. (B) the nuclei of both atoms contain the same number of neutrons. (C) the nuclei of both atoms contain the same number of protons. (D) both atoms must have the same mass. 2. What is the maximum number of electrons ...
... 1. If two atomic species are isotopes, then (A) both atoms must have identical nuclei. (B) the nuclei of both atoms contain the same number of neutrons. (C) the nuclei of both atoms contain the same number of protons. (D) both atoms must have the same mass. 2. What is the maximum number of electrons ...
Sec 3.1
... (In 1808, he explained the last 3 laws) 1. All matter is composed of extremely small particles ...
... (In 1808, he explained the last 3 laws) 1. All matter is composed of extremely small particles ...
Atom - Malibu High School
... Nucleus: the center of the atom; composed of neutrons and protons. Because the mass of the proton and the neutron is much larger than that of electrons, almost all the mass is located in the nucleus. Ion: a charged particle; # protons ≠ # electrons Electrons occupy most of the volume of an ato ...
... Nucleus: the center of the atom; composed of neutrons and protons. Because the mass of the proton and the neutron is much larger than that of electrons, almost all the mass is located in the nucleus. Ion: a charged particle; # protons ≠ # electrons Electrons occupy most of the volume of an ato ...
Build an Atom
... Protons have a relative mass of ___________ amu and a charge of ___________. Neutrons have a relative mass of ___________ amu and a charge of ___________. Electrons have a relative mass of nearly___________ amu and a charge of ___________. ...
... Protons have a relative mass of ___________ amu and a charge of ___________. Neutrons have a relative mass of ___________ amu and a charge of ___________. Electrons have a relative mass of nearly___________ amu and a charge of ___________. ...
Gen Chem--Chapter 3 lecture notes.ppt (Read
... 1. Element to left in Periodic Table comes first except for hydrogen: KCl PCl3 Al2S3 Fe3O4 ...
... 1. Element to left in Periodic Table comes first except for hydrogen: KCl PCl3 Al2S3 Fe3O4 ...
atoms
... The first ring can hold = 2 electrons. The second ring can hold = 8 electrons The third ring can hold = 18 electrons ...
... The first ring can hold = 2 electrons. The second ring can hold = 8 electrons The third ring can hold = 18 electrons ...
Wine Country Lodging near San Luis Obispo CA
... 1. Element to left in Periodic Table comes first except for hydrogen: KCl PCl3 Al2S3 Fe3O4 ...
... 1. Element to left in Periodic Table comes first except for hydrogen: KCl PCl3 Al2S3 Fe3O4 ...
chp 6 ppt - brown - edited - APchem-MCC
... • Photoelectric effect = the ability of certain materials to emit electrons from their surfaces when struck by electromagnetic radiation of a minimum frequency. This demonstrates a particle-like quality of light. The particles are called photons. These photons transfer their energies to electrons, w ...
... • Photoelectric effect = the ability of certain materials to emit electrons from their surfaces when struck by electromagnetic radiation of a minimum frequency. This demonstrates a particle-like quality of light. The particles are called photons. These photons transfer their energies to electrons, w ...
The collision theory of reactions
... The concentration of Cl atoms in the stratosphere is much less than the concentration of O atoms. How significant is reaction 6? do assignment 7, p.69 Chlorine atoms are particularly effective at removing ozone. A single atom can remove about 1 million ozone molecules. Add equations 6 and 7 togeth ...
... The concentration of Cl atoms in the stratosphere is much less than the concentration of O atoms. How significant is reaction 6? do assignment 7, p.69 Chlorine atoms are particularly effective at removing ozone. A single atom can remove about 1 million ozone molecules. Add equations 6 and 7 togeth ...
The Atom Philosophy to Scientific Theory
... weigh differently (# protons and # neutrons) s How many atoms are in 3.2 grams of He? s How many molecules are in 16.0 grams of ...
... weigh differently (# protons and # neutrons) s How many atoms are in 3.2 grams of He? s How many molecules are in 16.0 grams of ...
Balancing Equations
... 1. Word Equations—Show the names of reactants and products. Example: Sodium + Chlorine Sodium chloride 2. Chemical equations—Show the formulas of reactants and products. Example: Na + Cl2 NaCl (Not Balanced Yet!) 3. Skeleton equations—Equations that are not yet balanced to represent what actuall ...
... 1. Word Equations—Show the names of reactants and products. Example: Sodium + Chlorine Sodium chloride 2. Chemical equations—Show the formulas of reactants and products. Example: Na + Cl2 NaCl (Not Balanced Yet!) 3. Skeleton equations—Equations that are not yet balanced to represent what actuall ...
Redox
... the loss/gain of hydrogen. Oxidation is the gain of oxygen or the loss of hydrogen; reduction is the loss of oxygen or the gain of hydrogen. These definitions can only be used when a chemical reaction involves hydrogen and oxygen, and therefore their usefulness is limited. ...
... the loss/gain of hydrogen. Oxidation is the gain of oxygen or the loss of hydrogen; reduction is the loss of oxygen or the gain of hydrogen. These definitions can only be used when a chemical reaction involves hydrogen and oxygen, and therefore their usefulness is limited. ...
Notes section 5.2
... Hydrogen Atomic Orbitals • Just as Bohr’s model had numbers assigned to electron orbits, so does the quantum mechanical model. There are 4 quantum numbers for orbitals. • Principal quantum number (n) indicates the relative size and energy of atomic orbitals. • n specifies the atom’s major energy le ...
... Hydrogen Atomic Orbitals • Just as Bohr’s model had numbers assigned to electron orbits, so does the quantum mechanical model. There are 4 quantum numbers for orbitals. • Principal quantum number (n) indicates the relative size and energy of atomic orbitals. • n specifies the atom’s major energy le ...
notes section 5.2
... Hydrogen Atomic Orbitals • Just as Bohr’s model had numbers assigned to electron orbits, so does the quantum mechanical model. There are 4 quantum numbers for orbitals. • Principal quantum number (n) indicates the relative size and energy of atomic orbitals. • n specifies the atom’s major energy le ...
... Hydrogen Atomic Orbitals • Just as Bohr’s model had numbers assigned to electron orbits, so does the quantum mechanical model. There are 4 quantum numbers for orbitals. • Principal quantum number (n) indicates the relative size and energy of atomic orbitals. • n specifies the atom’s major energy le ...