Eva Knoth PH263 – Lab 7 March 30, 2011 The Photoelectric Effect
... The Photoelectric Effect Introduction The photoelectric effect is the emission of electrons from a substance due to light striking its surface (Knight, 1209). Heinrich Hertz first discovered that an electrode can be discharged by shining ultraviolet light on its surface (Knight, 1208). J.J. Thompson ...
... The Photoelectric Effect Introduction The photoelectric effect is the emission of electrons from a substance due to light striking its surface (Knight, 1209). Heinrich Hertz first discovered that an electrode can be discharged by shining ultraviolet light on its surface (Knight, 1208). J.J. Thompson ...
03_Worked_Examples
... there are two C atoms in each molecule, this sample contains 12 1023 C atoms. Because each CO2 molecule contains one C atom, the CO2 sample contains 9 1023 C atoms. Hence, the order is 12 g 12C (6 1023 C atoms) < 9 1023 CO2 molecules (9 1023 C atoms) < 1 mol C2H2 (12 1023 C atoms). Check ...
... there are two C atoms in each molecule, this sample contains 12 1023 C atoms. Because each CO2 molecule contains one C atom, the CO2 sample contains 9 1023 C atoms. Hence, the order is 12 g 12C (6 1023 C atoms) < 9 1023 CO2 molecules (9 1023 C atoms) < 1 mol C2H2 (12 1023 C atoms). Check ...
Red-ox reactions Electochemistry
... Step 1: Break the redox reaction into oxidation and reduction half-reactions. ...
... Step 1: Break the redox reaction into oxidation and reduction half-reactions. ...
Chapter 7 The Quantum Mechanical Model of the Atom
... very specific amounts of energy fixed amounts = quantized ...
... very specific amounts of energy fixed amounts = quantized ...
Chapter 7 The Quantum Mechanical Model of the Atom
... very specific amounts of energy fixed amounts = quantized ...
... very specific amounts of energy fixed amounts = quantized ...
E g
... Exciton: Large and strongly interactive particles formed when an electron, excited by a photon into the conduction band of a semiconductor, binds with the positively charged hole it left behind in the valence band. Exciton Bohr radius is the smallest possible orbit for the electron, that with the lo ...
... Exciton: Large and strongly interactive particles formed when an electron, excited by a photon into the conduction band of a semiconductor, binds with the positively charged hole it left behind in the valence band. Exciton Bohr radius is the smallest possible orbit for the electron, that with the lo ...
03_Worked_Examples
... there are two C atoms in each molecule, this sample contains 12 1023 C atoms. Because each CO2 molecule contains one C atom, the CO2 sample contains 9 1023 C atoms. Hence, the order is 12 g 12C (6 1023 C atoms) < 9 1023 CO2 molecules (9 1023 C atoms) < 1 mol C2H2 (12 1023 C atoms). Check ...
... there are two C atoms in each molecule, this sample contains 12 1023 C atoms. Because each CO2 molecule contains one C atom, the CO2 sample contains 9 1023 C atoms. Hence, the order is 12 g 12C (6 1023 C atoms) < 9 1023 CO2 molecules (9 1023 C atoms) < 1 mol C2H2 (12 1023 C atoms). Check ...
Problem Set 4 Solutions
... Assume that an electron is confined inside a one-dimensional box of width 1 Å. Estimate the uncertainty in position of the electron from the probability distribution for an electron in its ground state. Next, determine the energy of the electron in its ground state and calculate the magnitude of the ...
... Assume that an electron is confined inside a one-dimensional box of width 1 Å. Estimate the uncertainty in position of the electron from the probability distribution for an electron in its ground state. Next, determine the energy of the electron in its ground state and calculate the magnitude of the ...
Chemical Reactions
... 26. A solution is prepared by mixing 10.0 grams of benzene (C 6H6) in 150 g of water to create a solution total volume of 102 ml. Calculate the molarity, mass percent, and molality of benzene in the solution. 27. 1 gram of salt (NaCl) is added to 100 mL of water. What are the new freezing and boilin ...
... 26. A solution is prepared by mixing 10.0 grams of benzene (C 6H6) in 150 g of water to create a solution total volume of 102 ml. Calculate the molarity, mass percent, and molality of benzene in the solution. 27. 1 gram of salt (NaCl) is added to 100 mL of water. What are the new freezing and boilin ...
Electronic Structure Calculations of InP
... it is impossible to obtain the required energy levels ordering in the QD and QW. However, the QDs with large aspect ratios cannot be completely excluded, since the situation could be changed when the composition distribution within an individual nanostructure is taken into account [13]. 4. Conclusio ...
... it is impossible to obtain the required energy levels ordering in the QD and QW. However, the QDs with large aspect ratios cannot be completely excluded, since the situation could be changed when the composition distribution within an individual nanostructure is taken into account [13]. 4. Conclusio ...
COM and Momentum
... 3) Continues forward with the same speed (V) it had just before. 4) Continues forward with twice the speed (2V) 5) There can't possibly be enough information to decide. ...
... 3) Continues forward with the same speed (V) it had just before. 4) Continues forward with twice the speed (2V) 5) There can't possibly be enough information to decide. ...
SUGGESTED TIMELINE: 4 Weeks - Hazlet Township Public Schools
... HS-PS1-1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms. HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of ...
... HS-PS1-1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms. HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of ...
Electron Deep Orbits of the Hydrogen Atom1
... and then E0 ~ mc2α. So, if α −> 0, we have the total energy E0 −> 0, and this implies that the absolute value of binding energy |BE| = mc2 - E0 −> mc2, its maximum possible value. In fact, we think this result is obtained in the context of an ill-defined system, uniquely on a pure mathematical basis ...
... and then E0 ~ mc2α. So, if α −> 0, we have the total energy E0 −> 0, and this implies that the absolute value of binding energy |BE| = mc2 - E0 −> mc2, its maximum possible value. In fact, we think this result is obtained in the context of an ill-defined system, uniquely on a pure mathematical basis ...
Lifetime of Rubidium Rydberg Atoms in a Magneto - UvA-DARE
... To be able to study Rydberg atoms effectively we want them to be confined to a defined region of space during the experiment. This is achieved by creating a magneto-optical trap of rubidium atoms, which both traps the atoms and cools them to around 90 µK [7] [8]. These cold trapped atoms are then ex ...
... To be able to study Rydberg atoms effectively we want them to be confined to a defined region of space during the experiment. This is achieved by creating a magneto-optical trap of rubidium atoms, which both traps the atoms and cools them to around 90 µK [7] [8]. These cold trapped atoms are then ex ...
Chapter 9
... (a) We use Fig. 9-21 of the text (which treats both angles as positive-valued, even though one of them is in the fourth quadrant; this is why there is an explicit minus sign in Eq. 9-80 as opposed to it being implicitly in the angle). We take the cue ball to be body 1 and the other ball to be body 2 ...
... (a) We use Fig. 9-21 of the text (which treats both angles as positive-valued, even though one of them is in the fourth quadrant; this is why there is an explicit minus sign in Eq. 9-80 as opposed to it being implicitly in the angle). We take the cue ball to be body 1 and the other ball to be body 2 ...
Quantum Psychoanalysis
... In a theoretical essay on metaphor and meaning from Section Two of this book, Gargiulo points to the underlying metaphorical structure of knowledge. Psychoanalytic models are inherently metaphorical, but, according to Gargiulo, “The reality is that if we are not const ...
... In a theoretical essay on metaphor and meaning from Section Two of this book, Gargiulo points to the underlying metaphorical structure of knowledge. Psychoanalytic models are inherently metaphorical, but, according to Gargiulo, “The reality is that if we are not const ...
Matter and Measurement
... 1) The oxidation state on any atom in its elemental form is zero (H2, O2, Na(s)) 2) The sum of the oxidation states of all atoms in a neutral compound is zero (CH4, NH3) 3) The sum of the oxidation states of all atoms in an ion is equal to the charge on the ion (NO3-, SO42-) 4) The oxidation state o ...
... 1) The oxidation state on any atom in its elemental form is zero (H2, O2, Na(s)) 2) The sum of the oxidation states of all atoms in a neutral compound is zero (CH4, NH3) 3) The sum of the oxidation states of all atoms in an ion is equal to the charge on the ion (NO3-, SO42-) 4) The oxidation state o ...
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.