Continuous spectrum: a spectrum that exhibits all the wavelengths of visible light 13. Line Spectrum: a spectrum showing only certain discrete wavelengths 14. Quantum model: The quantum mechanical model is based on quantum theory, which says matter also has properties associated with waves. According to quantum theory, it’s impossible to know the exact position and momentum of an electron at the same time 15. Ground state: the lowest possible energy state of an atom of molecule 16.
Object A has a net charge of excess electrons. Object B is grounded. Which object is at a higher potential? A) A B) B C) Both are at the same potential. D) cannot be determined without more information Answer: B Diff: 2 Type: BI Var: 1 Page Ref: Sec.
Describe the differences between protons and electrons The difference between protons and electrons is that protons are positively charged and that elections are negatively charged. Another difference is that protons are in the nucleus and electrons circle the nucleus in shells outside the nucleus. What is the difference between the mass number and the relative atomic mass of an element? The difference between the mass number and the atomic mass is that the mass number is the number of protons and neutrons in the nucleus and the relative atomic mass is the mass of an atom. Distinguish between an element and a compound with 2 examples for each An element is a substance that cannot be broken down into any simpler substances.
Introduction to Magnetism & Inductance Magnetism When elemental atomic particles move in certain materials such as iron, nickel or cobalt a magnetic field is generated. Materials that possess this property are known as ferrous or ferromagnetic materials. All ferrous materials will also react to an external magnetic field, such as a magnet or electromagnet. As a ferrous material is exposed to a magnetic field its atoms will align effectively creating many tiny magnets with north and south poles. The above diagram shows to samples of a ferrous material.
The electrons experience a magnetic force due to the field that is perpendicular to the velocity vector, so the electrons follow a circular path. By measuring the radius of the circular electron beam, the acceleration voltage and the current supplied, we can determine the charge to mass ratio. The value obtained was 1.00E11C/kg, which has a 30.65% percent deviation from the theoretical value. Introduction Velocity Vector Velocity Vector r r Electron Gun Voltage Controller Electron Gun Voltage Controller B B ΔV ΔV -Explanation: An electron is being shot by an electron gun/cathode gun. The electron is accelerating by being repelled by a negative plate and attracted by a positive plate.
When the electronegativity difference is 0.0 - 0.4 the electrons are considered to share equally in a non-polar covalent bond. For example. Cl- Cl bond ( 3.16 -3.16= 0 ) As this number increases the shared electrons are attached more strongly to the electronegative atom which increases the polarity. When the electronegativity is greater than 0.5 - 1.8, the elements is polar. For example.
When the equation of mass of a photon turns to unification, this equation is applicable to all fields from the particle to the universe as a hole. Here is the example of energy emission that in what way the fission be possible. To find this, we should clarify first the mass of a photon and the equation of unification physics. Key words: mass of a photon, unification of physics, value of Pi at excited state, unknown weight of radioactive elements, fission reaction
The critical process requires that one neutron from each fission process produces only one more fission process. This way is more controlled and happens at a steady pace. A supercritical process is when each fission process produces more than one neutron and each neutron causes only fission processes. This process produces rapidly and becomes uncontrollable causing an explosion to happen. The critical mass is the amount of fissionable material needed to sustain a nuclear chain reaction at the critical level.
How does the Sun produce energy? The Sun produces energy by the nuclear fusion of hydrogen into helium in its core. What that means is that, since there is a huge amount of hydrogen in the core, these atoms stick together and fuse into a helium atom. This energy is then radiated out from the core and moves across the solar system. It is not enough to just answer the question, so here is a breakdown of how the energy is transferred from the core to the Earth and the other objects in our solar system.
LU 1 Chemistry and Chemical Nomenclature LU 1: CHEMISTRY AND CHEMICAL NOMENCLATURE 1.1 Keys to the study of chemistry Chemistry deals with the properties and transformation of matter and the energy associated with those changes. 1.1.1 Matter, elements and compounds Matter is anything that occupies space (volume) and has mass: such as air, water, planets, and students. Matter occurs commonly in three physical states: solid, liquid or gas. It exists either as pure matter or impure matter. The pure matter can be an element or a compound, and impure matter is a mixture (Figure 1.1).