Chapter 2 – Atoms and Elements - U of L Class Index
... The Bohr model of the atom pictures an electron as a particle circling the nucleus of an atom in a fixed orbital similar to the way that planets circle the sun (except that planets cannot ‘jump’ from one orbital to another – which is probably a good thing!). The main flaw in the Bohr model of the a ...
... The Bohr model of the atom pictures an electron as a particle circling the nucleus of an atom in a fixed orbital similar to the way that planets circle the sun (except that planets cannot ‘jump’ from one orbital to another – which is probably a good thing!). The main flaw in the Bohr model of the a ...
proton 8x106 ms
... 3. In a particle accelerator, electric fields are used to accelerate sub atomic particles. By equating work done and kinetic energy, find the velocity of each of the following when placed in a 14kV electric field, assuming the particles are initially at rest. (a) a proton (b) an electron (c) an alph ...
... 3. In a particle accelerator, electric fields are used to accelerate sub atomic particles. By equating work done and kinetic energy, find the velocity of each of the following when placed in a 14kV electric field, assuming the particles are initially at rest. (a) a proton (b) an electron (c) an alph ...
Chapter 2.2 and 7 Notes
... 5 orbitals, 2 electrons each 10 total electrons in each energy level Do not show up until the 3rd energy level ...
... 5 orbitals, 2 electrons each 10 total electrons in each energy level Do not show up until the 3rd energy level ...
Revision sheet and answer1
... 10) The oxidation number of hydrogen in sodium hydride is +1 and the oxidation number of oxygen in potassium superoxide is –1 . 11) Atomic radius is defined as the double distance between the centres of two similar atoms in a diatomic molecule . 12) Oxidation number of manganese in KMnO4 compound is ...
... 10) The oxidation number of hydrogen in sodium hydride is +1 and the oxidation number of oxygen in potassium superoxide is –1 . 11) Atomic radius is defined as the double distance between the centres of two similar atoms in a diatomic molecule . 12) Oxidation number of manganese in KMnO4 compound is ...
Unit 3 Practice Test
... A. Non-metals generally have the higher electronegativities and tend to attract electrons to themselves in a chemical bond. B. Elements with high ionization energies tend to have small atomic radii. C. Elements with high electronegativities generally form ions with small radii. D. The second ionizat ...
... A. Non-metals generally have the higher electronegativities and tend to attract electrons to themselves in a chemical bond. B. Elements with high ionization energies tend to have small atomic radii. C. Elements with high electronegativities generally form ions with small radii. D. The second ionizat ...
Development of Bohr model due to atomic emission spectra of some
... revolve around the nucleus on distinct radii, each of those radii due to their distance from the nucleus represent an energy level. These energy levels were not continuously, but existed only at discrete values. Each of these energy packs was called a quantum. The idea of quantized radiation was fir ...
... revolve around the nucleus on distinct radii, each of those radii due to their distance from the nucleus represent an energy level. These energy levels were not continuously, but existed only at discrete values. Each of these energy packs was called a quantum. The idea of quantized radiation was fir ...
Lecture 5-15-08 Science of Solar Cells (Powerpoint presentation)
... flow of electrons (current) So the question is: How does this conversion process take place? This was the difficulty people had with trying to make a solar cell…until around 1954 in Bell Labs And it turns out our old friend, the PN junction was the missing link that when discovered, made the first S ...
... flow of electrons (current) So the question is: How does this conversion process take place? This was the difficulty people had with trying to make a solar cell…until around 1954 in Bell Labs And it turns out our old friend, the PN junction was the missing link that when discovered, made the first S ...
Physics 106a – Problem Set 2 – Due Oct 14,...
... forces exert no net torque. For a uniform gravitational force, show that the center of gravity is identical to the center of mass for the system of particles. (Review the discussion of angular momentum and torque on a system of particles and it should become clear how to approach this problem.) 2. S ...
... forces exert no net torque. For a uniform gravitational force, show that the center of gravity is identical to the center of mass for the system of particles. (Review the discussion of angular momentum and torque on a system of particles and it should become clear how to approach this problem.) 2. S ...
Chemistry Final Test 1999-2000 - Nashoba Valley Technical High
... Rutherford’s experiment Valence electrons and Octet Rule Structure of atom Predict charge of ions formed from Periodic Table Subatomic particles Noble gases – stability Atomic number, mass number vs. average atomic mass Write orbital diagram Isotopes Radioactivity/stability of nu ...
... Rutherford’s experiment Valence electrons and Octet Rule Structure of atom Predict charge of ions formed from Periodic Table Subatomic particles Noble gases – stability Atomic number, mass number vs. average atomic mass Write orbital diagram Isotopes Radioactivity/stability of nu ...
The Periodic Table - Mrs Molchany`s Webpage
... across the period. More protons are added going across the period. The protons have a stronger pull on the electrons. The strong attractive forces between the protons and the outermost (valence) electrons shrinks the orbitals and makes the atoms smaller. Generally speaking, effective nuclear charge ...
... across the period. More protons are added going across the period. The protons have a stronger pull on the electrons. The strong attractive forces between the protons and the outermost (valence) electrons shrinks the orbitals and makes the atoms smaller. Generally speaking, effective nuclear charge ...
Hydrogen Bonding
... It is the cardinal rule of bonding. It is the gain in stability when atoms have a full complement of eight electrons in their valence shells. The bonding in carbon dioxide (CO2): all atoms are surrounded by 8 electrons, fulfilling the octet rule http://en.wikipedia.org/wiki/Octet_rule ...
... It is the cardinal rule of bonding. It is the gain in stability when atoms have a full complement of eight electrons in their valence shells. The bonding in carbon dioxide (CO2): all atoms are surrounded by 8 electrons, fulfilling the octet rule http://en.wikipedia.org/wiki/Octet_rule ...
Spherical harmonics: • The quantum numbers n, l, m determine the
... result in nodal surfaces where the probability of finding the electron vanishes. This is because bound particles are standing waves! ...
... result in nodal surfaces where the probability of finding the electron vanishes. This is because bound particles are standing waves! ...
INTENSITIES OF STARK COMPONENTS UNDER CONDITIONS OF
... A motional Stark effect experiment uses the propagation of a typically 25-100 keV neutral hydrogen (or deuterium) beam injected in the plasma core. Beam neutrals are excited by collisions with the background plasma ions and electrons to higher levels whose deexcitation leads in particular to the emi ...
... A motional Stark effect experiment uses the propagation of a typically 25-100 keV neutral hydrogen (or deuterium) beam injected in the plasma core. Beam neutrals are excited by collisions with the background plasma ions and electrons to higher levels whose deexcitation leads in particular to the emi ...
Arrangement of the Electrons Chapter 4
... 3.) When energy is absorbed by the atom, the electron moves into a higher energy orbit. This energy is released when the electron falls back to a lower energy orbit. A photon of light is emitted. ...
... 3.) When energy is absorbed by the atom, the electron moves into a higher energy orbit. This energy is released when the electron falls back to a lower energy orbit. A photon of light is emitted. ...
General Chemistry
... A (monatomic) anion is named by placing -ide at the end of the root of the element’s name. ...
... A (monatomic) anion is named by placing -ide at the end of the root of the element’s name. ...
Energy Sublevels
... In 1913 Bohr showed how electrons were quantized In 1924 De Broglie showed how an electron could behave as a wave. ...
... In 1913 Bohr showed how electrons were quantized In 1924 De Broglie showed how an electron could behave as a wave. ...
Chapter 6 lecture 2
... existence of a matter wavelength for a particle of mass m and velocity v given by ...
... existence of a matter wavelength for a particle of mass m and velocity v given by ...
Light - UDChemistry
... • It is impossible to know both the position and momentum of an electron simultaneously • The only way to know anything about an electron is to shoot it with a photon • The photon alters the position and/or momentum in an unpredictable manner, so the original position and ...
... • It is impossible to know both the position and momentum of an electron simultaneously • The only way to know anything about an electron is to shoot it with a photon • The photon alters the position and/or momentum in an unpredictable manner, so the original position and ...
Physics Qualifying Examination – Part I 7-Minute Questions September 12, 2015
... 16. Cold interstellar molecular clouds often contain the molecule cyanogen (CN). The first rotational excited state of CN has an energy of 4.7 × 10 −4 eV above the ground state. the excited state has a degeneracy of 3. In 1940, astronomers found that for every 10 CN molecules that are in the ground ...
... 16. Cold interstellar molecular clouds often contain the molecule cyanogen (CN). The first rotational excited state of CN has an energy of 4.7 × 10 −4 eV above the ground state. the excited state has a degeneracy of 3. In 1940, astronomers found that for every 10 CN molecules that are in the ground ...
Atomic theory
In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.The word atom comes from the Ancient Greek adjective atomos, meaning ""uncuttable"". 19th century chemists began using the term in connection with the growing number of irreducible chemical elements. While seemingly apropos, around the turn of the 20th century, through various experiments with electromagnetism and radioactivity, physicists discovered that the so-called ""uncuttable atom"" was actually a conglomerate of various subatomic particles (chiefly, electrons, protons and neutrons) which can exist separately from each other. In fact, in certain extreme environments, such as neutron stars, extreme temperature and pressure prevents atoms from existing at all. Since atoms were found to be divisible, physicists later invented the term ""elementary particles"" to describe the ""uncuttable"", though not indestructible, parts of an atom. The field of science which studies subatomic particles is particle physics, and it is in this field that physicists hope to discover the true fundamental nature of matter.