| | | The energy of a single photoelectron depends only on the frequency of the incident light. | | | The energy of a photoelectron is equal to the sum of the photon energy and the energy needed to remove the electron from the metal. | | | A higher intensity of the incident light means a higher number of emitted photons. | 1 points Question 7 1. In an unexcited atom, the electrons occupy Answer | | the levels with lowest energies.
The simplest and most common element is Hydrogen, which can be in the form of a single proton, an extremely tiny particle with a positive charge. Sometimes electrons, even tinier particles, surround the proton, forming negatively charged shells. When two Hydrogen atoms link together, they form a Hydrogen molecule. Our sun, and all the other stars in the universe, are mostly made of the element Hydrogen. Trillions and Trillions of Hydrogen atoms are being smashed together in the sun and releasing energy which we feel as light and radiation.
Planck's constant: the constant relating the change in energy for a system to the frequency of the electromagnatic radiation absorbed or emitted, equal to 6.626 X 10^-34 J 5. Quantization: the concept that energy can occur only in discrete units called quanta 6. Photon: a quantum of electromagnetic radiation 7. Photoelectric effect: ejection of electrons from a substance by incident electromagnetic radiation, especially by visible light 8. E=mc^2: Einstein's equation proposing that energy has mass; E is energy, m is mass, and c is the speed of light 9.
BETA PARTICLES Beta rays are much lighter energy particles. The beta particle is an energetic electron given off by the nucleus of unstable isotopes to restore an energy balance. They leave the nucleus at a speed of 270,000 kilometers per second. They can be stopped, for instance, by an aluminum sheet a few millimeters thick or by 3 meters of air. The RS-500 can detect most energetic beta particles through the case.
In the earth's atmosphere, neon only comprises 0.0018 percent of the volume. On the earth, neon is always present as a gas. There are many physical properties of neon, such as the fact that it is colorless, odorless, and tasteless. Also, neon is lighter than air. With a density of density 0.89990 g/liter.
Nuclear fusion and nuclear fission are two different types of energy-releasing reactions in which energy is released from high-powered atomic bonds between the particles within the nucleus. The main difference between these two processes is that fission is the splitting of an atom into two or more smaller ones while fusion is the fusing of two or more smaller atoms into a larger one. Nuclear fission is a class of nuclear change. Nuclear fission occurs when a very heavy nucleus splits into two smaller nuclei, each more stable than the original nucleus. Most fission reactions happen artificially by bombarding nuclei with neutrons.
The charge on a mole of electrons for some time and is the constant called the Faraday. The estimate of the value of a faraday is 96,485.3383 coulombs per mole of electrons. The estimate of the charge on an election base is 1.60217653 x 10^-19 coulombs per electron. Divided the charge of a mole of an election obtains the value of 6.02214154 x 10^23 particles per mole. According to Bender oxygen and hydrogen are elements other than carbon used to define mole.
By contrast, an electron in Bohr's model emits no energy, as long as its energy has one of the above-mentioned values. However, an electron which is not in the lowest energy level (n = 1), can make a spontaneous change to a lower state and thereby emit the energy difference in the form of a photon (particle of light). By calculating the wavelengths of the corresponding electromagnetic waves, one will get the same results as by measuring the lines of the hydrogen spectrum. Data |Quantum number |Radius (10-11) |Total Energy eV | |1 |5.29 |-13.60
This field is said to be active and frequently interrelating with the solar wind and channelling plasma into Mercury’s surface from the sun. The chemicals captured from the solar wind include Hydrogen and Helium, which help create Mercury’s extremely thin atmosphere. Scientists would argue that there is ‘no’ atmosphere on Mercury at all. The little amount of gas found on Mercury is trillions of times thinner than the gasses found on earth, and would not be able to be detected without exceptionally sensitive equipment. Although very thin, Mercury’s atmosphere is made up of trace amounts of gasses including 42% Oxygen, 29% Sodium, 22% Hydrogen, 6% Helium, and 0.5% Potassium.
DISPERSION FORCE / LONDON FORCE The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction. London forces are the attractive forces that cause nonpolar substances to condense to liquids and to freeze into solids when the temperature is lowered sufficiently. Because of the constant motion of the electrons, an atom or molecule can develop a temporary (instantaneous) dipole when its electrons are distributed unsymmetrically about the nucleus.