1st Semester Exam in High School Chemistry
... 7. Which of the following BEST describes what happens when most substances change from a solid state to a liquid state? A. The molecules slow down. B. The molecules move farther apart. C. The molecules get smaller. D. The molecules lose energy. ...
... 7. Which of the following BEST describes what happens when most substances change from a solid state to a liquid state? A. The molecules slow down. B. The molecules move farther apart. C. The molecules get smaller. D. The molecules lose energy. ...
200 ways to pass the regents
... 7. The atomic number is equal to the number of protons in the nucleus of an atom. 8. The number of neutrons = mass number – atomic number. 9. Isotopes are atoms with equal numbers of protons, but differ in their neutron numbers. 10. Cations are positive (+) ions and form when a neutral atom loses el ...
... 7. The atomic number is equal to the number of protons in the nucleus of an atom. 8. The number of neutrons = mass number – atomic number. 9. Isotopes are atoms with equal numbers of protons, but differ in their neutron numbers. 10. Cations are positive (+) ions and form when a neutral atom loses el ...
The Atom
... 3. A thin sheet of paper or clothing can stop alpha particles. It will not penetrate the skin on your body. 4. In alpha emission, the parent nuclide decays into a ...
... 3. A thin sheet of paper or clothing can stop alpha particles. It will not penetrate the skin on your body. 4. In alpha emission, the parent nuclide decays into a ...
Document
... Main group elements tend to form stable ions with the same # electrons as the nearest noble gas. ...
... Main group elements tend to form stable ions with the same # electrons as the nearest noble gas. ...
Chemistry Curriculum Guide
... d) manipulation of multiple variables, using repeated trials; and e) accurate recording, organization, and analysis of data through repeated trials. f) mathematical and procedural error analysis; and g) mathematical manipulations (SI units, scientific notation, linear equations, graphing, ratio and ...
... d) manipulation of multiple variables, using repeated trials; and e) accurate recording, organization, and analysis of data through repeated trials. f) mathematical and procedural error analysis; and g) mathematical manipulations (SI units, scientific notation, linear equations, graphing, ratio and ...
Quantum Chemistry - Winona State University
... Micro: Determine the uncertainty in finding the el ectron in an atom with a 1% uncertainty in determination of its speed. Macro: Determine the uncertainty in finding student along a 100 m track with a 1% uncertainty in determination of his speed. ...
... Micro: Determine the uncertainty in finding the el ectron in an atom with a 1% uncertainty in determination of its speed. Macro: Determine the uncertainty in finding student along a 100 m track with a 1% uncertainty in determination of his speed. ...
Conjugated Bonding in Cyanine Dyes: A "Particle In A Box" Model
... molecules and determine max for each compound. These results will then be compared with max values obtained by treating the conjugated electrons of the molecules as a free-electron gas confined to a one-dimensional box whose length is that of the molecule. The "Particle In A Box" problem is one ...
... molecules and determine max for each compound. These results will then be compared with max values obtained by treating the conjugated electrons of the molecules as a free-electron gas confined to a one-dimensional box whose length is that of the molecule. The "Particle In A Box" problem is one ...
Name: Period:______ PHYSICAL SCIENCE 1st Semester Final
... Dalton proposed the atomic theory stating that all matter is made up of particles called atoms that cannot be divided. Thomson’s experiments provided the first evidence that atoms are made up of smaller particles called subatomic particles (electrons, neutrons, protons). According to Rutherfor ...
... Dalton proposed the atomic theory stating that all matter is made up of particles called atoms that cannot be divided. Thomson’s experiments provided the first evidence that atoms are made up of smaller particles called subatomic particles (electrons, neutrons, protons). According to Rutherfor ...
Midterm Review Packet - Mrs. McKenzie`s Chemistry and ICP Classes
... 4. Charged particles that move around an atom's nucleus are called ________________________. 5. Chemical bonds are broken, atoms are rearranged, and new bonds are formed during ___________________________ ______________________________. 6. Atoms with filled outermost energy levels tend _____________ ...
... 4. Charged particles that move around an atom's nucleus are called ________________________. 5. Chemical bonds are broken, atoms are rearranged, and new bonds are formed during ___________________________ ______________________________. 6. Atoms with filled outermost energy levels tend _____________ ...
Atomic Structure Review Part 1
... 2. Compare and contrast Thomson’s plum pudding atomic model with Rutherford’s nuclear atomic model. ...
... 2. Compare and contrast Thomson’s plum pudding atomic model with Rutherford’s nuclear atomic model. ...
Quantization of Energy
... • For a particular metal and a given color of light, say blue, it is found that the electrons come out with a well-defined speed, and that the number of electrons that come out depends on the intensity of the light. • If the intensity of light is increased, more electrons come out, but each electron ...
... • For a particular metal and a given color of light, say blue, it is found that the electrons come out with a well-defined speed, and that the number of electrons that come out depends on the intensity of the light. • If the intensity of light is increased, more electrons come out, but each electron ...
Chapter Outline • Review of Atomic Structure Electrons, protons
... The atomic mass unit (amu) is often used to express atomic weight. 1 amu is defined as 1/12 of the atomic mass of the most common isotope of carbon atom that has 6 protons (Z=6) and six neutrons (N=6). Mproton ≈ Mneutron = 1.66 x 10-24 g = 1 amu. The atomic mass of the 12 C atom is 12 amu. The atomi ...
... The atomic mass unit (amu) is often used to express atomic weight. 1 amu is defined as 1/12 of the atomic mass of the most common isotope of carbon atom that has 6 protons (Z=6) and six neutrons (N=6). Mproton ≈ Mneutron = 1.66 x 10-24 g = 1 amu. The atomic mass of the 12 C atom is 12 amu. The atomi ...
Hydrogen-like atoms and ions - solutions to the
... qp_lithium.m mscripts for plotting the probability function for the neutral lithium atom using the data stored in the file qp_hL.mat ...
... qp_lithium.m mscripts for plotting the probability function for the neutral lithium atom using the data stored in the file qp_hL.mat ...
3D quantum mechanics, hydrogen atom
... What is the momentum of an electron in the 1st excited state of an infinite square well potential? The infinite square well energy levels are En = n2ħ2π2/2mL2. The first excited state is n = 2. The only way we know how to get the momentum is from the energy. The kinetic energy in this state is E2 = ...
... What is the momentum of an electron in the 1st excited state of an infinite square well potential? The infinite square well energy levels are En = n2ħ2π2/2mL2. The first excited state is n = 2. The only way we know how to get the momentum is from the energy. The kinetic energy in this state is E2 = ...
Bohr model
In atomic physics, the Rutherford–Bohr model or Bohr model, introduced by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus—similar in structure to the solar system, but with attraction provided by electrostatic forces rather than gravity. After the cubic model (1902), the plum-pudding model (1904), the Saturnian model (1904), and the Rutherford model (1911) came the Rutherford–Bohr model or just Bohr model for short (1913). The improvement to the Rutherford model is mostly a quantum physical interpretation of it. The Bohr model has been superseded, but the quantum theory remains sound.The model's key success lay in explaining the Rydberg formula for the spectral emission lines of atomic hydrogen. While the Rydberg formula had been known experimentally, it did not gain a theoretical underpinning until the Bohr model was introduced. Not only did the Bohr model explain the reason for the structure of the Rydberg formula, it also provided a justification for its empirical results in terms of fundamental physical constants.The Bohr model is a relatively primitive model of the hydrogen atom, compared to the valence shell atom. As a theory, it can be derived as a first-order approximation of the hydrogen atom using the broader and much more accurate quantum mechanics and thus may be considered to be an obsolete scientific theory. However, because of its simplicity, and its correct results for selected systems (see below for application), the Bohr model is still commonly taught to introduce students to quantum mechanics or energy level diagrams before moving on to the more accurate, but more complex, valence shell atom. A related model was originally proposed by Arthur Erich Haas in 1910, but was rejected. The quantum theory of the period between Planck's discovery of the quantum (1900) and the advent of a full-blown quantum mechanics (1925) is often referred to as the old quantum theory.