XII-1 - OP Jindal School, Raigarh
... Three particles, each of mass 1g and carrying a charge q, are suspended from a common point by insulated mass less strings, each 1m long. If the particles are in equilibrium and are located at the corners of an equilateral triangle of sides of length 3cm, calculate the charge q on each particle. Tak ...
... Three particles, each of mass 1g and carrying a charge q, are suspended from a common point by insulated mass less strings, each 1m long. If the particles are in equilibrium and are located at the corners of an equilateral triangle of sides of length 3cm, calculate the charge q on each particle. Tak ...
determining oxidation numbers
... 5. Other halogens have ONs = -1 except when bound to oxygen or another halogen higher in the column. 6. The ON for hydrogen is +1, except when bound to a metal, when it is -1. 7. Alkali metals always have an ON = +1. 8. Polyatomic ions all have specific total charges that will be the sum of the oxid ...
... 5. Other halogens have ONs = -1 except when bound to oxygen or another halogen higher in the column. 6. The ON for hydrogen is +1, except when bound to a metal, when it is -1. 7. Alkali metals always have an ON = +1. 8. Polyatomic ions all have specific total charges that will be the sum of the oxid ...
ppt - Physics
... If neutrons were created in the center of our galaxy, with what momentum would they need to be produced in order to reach Earth before decaying? The distance between the center of our galaxy and the Sun is about 25,000 light years. The neutron has a mass of 940 MeV, and its lifetime is 886s. ...
... If neutrons were created in the center of our galaxy, with what momentum would they need to be produced in order to reach Earth before decaying? The distance between the center of our galaxy and the Sun is about 25,000 light years. The neutron has a mass of 940 MeV, and its lifetime is 886s. ...
Chapter 2 1
... At both the symbolic and molecular levels, chemists employ “atoms” as the basic building block. Literally, “atoms” means “not cuttable” . It is a term that originates in ancient Greece with a philosopher named “Demokritus of Abdera”. Although you can not “see” atoms in the same sense that you can s ...
... At both the symbolic and molecular levels, chemists employ “atoms” as the basic building block. Literally, “atoms” means “not cuttable” . It is a term that originates in ancient Greece with a philosopher named “Demokritus of Abdera”. Although you can not “see” atoms in the same sense that you can s ...
2005 - The Physics Teacher
... such apparatus might allow physicists to break up all atomic nuclei at will. (Adapted from “The Fly in the Cathedral” Brian Cathcart; 2004) (i) What is the structure of an alpha particle? An alpha particle is identical to a helium nucleus (2 protons and 2 neutrons). (ii) Rutherford had bombarded gol ...
... such apparatus might allow physicists to break up all atomic nuclei at will. (Adapted from “The Fly in the Cathedral” Brian Cathcart; 2004) (i) What is the structure of an alpha particle? An alpha particle is identical to a helium nucleus (2 protons and 2 neutrons). (ii) Rutherford had bombarded gol ...
Brief introduction to quantum mechanics
... Solution requires: -Normalization of the wave function according ...
... Solution requires: -Normalization of the wave function according ...
1. I can define valence electron and use the periodic
... #1. I can define valence electron and use the periodic table to determine how many an element has. 1. What charge does an electron have? 2. How are valence electrons different from the number of total electrons? 3. How do you figure out how many valence electrons are in an atom? 4. Determine how man ...
... #1. I can define valence electron and use the periodic table to determine how many an element has. 1. What charge does an electron have? 2. How are valence electrons different from the number of total electrons? 3. How do you figure out how many valence electrons are in an atom? 4. Determine how man ...
Fine structure of the hydrogen atom
... and various hyperons. I have heard it said that « the finder of a new elementary particle used to be rewarded by a Nobel Prize, but such a discovery now ought to be punished by a $10,000 fine ». In order to determine the properties of elementary particles experimentally it is necessary to subject th ...
... and various hyperons. I have heard it said that « the finder of a new elementary particle used to be rewarded by a Nobel Prize, but such a discovery now ought to be punished by a $10,000 fine ». In order to determine the properties of elementary particles experimentally it is necessary to subject th ...
Is There a Maximum Z for an Atom? - Physics Department, Princeton
... Independent of the issue of whether nuclei can exist with Zα > ∼ 1, atoms with such nuclei could not be regarded as stable, in that they could interact with their accompanying positron(s) and change their state (at least temporarily). However, since there are no longlived nuclei with Z > ∼ 100, this ...
... Independent of the issue of whether nuclei can exist with Zα > ∼ 1, atoms with such nuclei could not be regarded as stable, in that they could interact with their accompanying positron(s) and change their state (at least temporarily). However, since there are no longlived nuclei with Z > ∼ 100, this ...
File
... 6. The effective nuclear charge experienced by the outermost electron of Na is different than the effective nuclear charge experienced by the outermost electron of Ne. This difference best accounts for which of the following? A. Na has a greater density at standard conditions than Ne. B. Na has a lo ...
... 6. The effective nuclear charge experienced by the outermost electron of Na is different than the effective nuclear charge experienced by the outermost electron of Ne. This difference best accounts for which of the following? A. Na has a greater density at standard conditions than Ne. B. Na has a lo ...
- dr
... The magnetic moment of a system is a measure of the magnitude and the direction of its magnetism. For example, a loop of electric current, a bar magnet, an electron, a molecule, and a planet all have their own magnetic moments. Magnetic moment usually refers to its magnetic dipole moment, and quant ...
... The magnetic moment of a system is a measure of the magnitude and the direction of its magnetism. For example, a loop of electric current, a bar magnet, an electron, a molecule, and a planet all have their own magnetic moments. Magnetic moment usually refers to its magnetic dipole moment, and quant ...
A Brief Overview of Atomic Structure
... There can be a variable number of neutrons for the same number of protons. Isotopes have the same number of protons but different numbers of neutrons. ...
... There can be a variable number of neutrons for the same number of protons. Isotopes have the same number of protons but different numbers of neutrons. ...
WAVE MECHANICS (Schrödinger, 1926)
... WAVE MECHANICS * The energy depends only on the principal quantum number, as in the Bohr model: En = -2.179 X 10-18J /n2 * The orbitals are named by giving the n value followed by a letter symbol for l: l= 0,1, 2, 3, 4, 5, ... s p d f g h ... * All orbitals with the same n are called a “shell”. All ...
... WAVE MECHANICS * The energy depends only on the principal quantum number, as in the Bohr model: En = -2.179 X 10-18J /n2 * The orbitals are named by giving the n value followed by a letter symbol for l: l= 0,1, 2, 3, 4, 5, ... s p d f g h ... * All orbitals with the same n are called a “shell”. All ...
ARRANGEMENT OF ELECTRONS IN ATOMS
... Bohr Model of the hydrogen atom - the model linked the atom’s electron with photon emission - the electron can circle the nucleus only in allowed paths or orbits - when the electron is in one of these orbits, the atom has a definite, fixed energy. The electron, and therefore the hydrogen atom, is in ...
... Bohr Model of the hydrogen atom - the model linked the atom’s electron with photon emission - the electron can circle the nucleus only in allowed paths or orbits - when the electron is in one of these orbits, the atom has a definite, fixed energy. The electron, and therefore the hydrogen atom, is in ...
Chemistry - Beachwood City Schools
... Which of the boxes above contain molecules? 4. List four physical states of matter. For each physical state, indicate whether the particles are in motion and whether they are close or far apart. 5. List one chemical and one physical property of the element chlorine. (You may use your textbook.) 6. D ...
... Which of the boxes above contain molecules? 4. List four physical states of matter. For each physical state, indicate whether the particles are in motion and whether they are close or far apart. 5. List one chemical and one physical property of the element chlorine. (You may use your textbook.) 6. D ...
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... The Atom and Unanswered Questions • Recall that in Rutherford's model, the atom’s mass is concentrated in the nucleus and electrons move around it. • The model doesn’t explain how the electrons were arranged around the nucleus. • The model doesn’t explain why negatively charged electrons aren’t pul ...
... The Atom and Unanswered Questions • Recall that in Rutherford's model, the atom’s mass is concentrated in the nucleus and electrons move around it. • The model doesn’t explain how the electrons were arranged around the nucleus. • The model doesn’t explain why negatively charged electrons aren’t pul ...
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.